Don't know if anyone has posted this before, but as of last year in mid-November Dan Ackroyd still mentions it.
I don't think anything new to report though.
Apparently he said this at the Latino Review and Moviehole websites.
Here is the text:
Aykroyd still keen for Ghostbusters 3
Posted on Tue, 16-Nov-2004
As every Ghosbusters fan knows, a third film is about as likely to happen as Jessica Simpson enrolling in post-grad marketing studies at UCLA. In other words : Not too likely.
Slime-shooting Dan Aykroyd is still keen to do it. He just has a board of suits to convince. And once they learn that Bill Murray would rather have his teeth extracted than do a ÂGhostbusters 3Â, theyÂll turn their attention to the pooping pigeon outside on the studio window still and away from the pitch.
Aykroyd tells Latino Review that Murray isnÂt the only one whoÂs balked at the idea of doing a second sequel. Apparently Âmost of the cast have. Harold Ramis, Annie Potts and Ernie Hudson co-starred in the previous films.
A couple of years back, Aykroyd mentioned that he had an idea to bring in a new young cast of ÂGhosbtusters  Will SmithÂs name was mentioned at one point, probably after the success of ÂIndependence Day and ÂID4  and he says thatÂs still one idea he could consider  if only the rights holders of ÂGhostbusters would let him. At the moment, he says those that would make such a call  and heÂs not naming names  wonÂt let him.
Funnily enough, just three short years ago, Harold Ramis mentioned something similar  and sounded quite keen to do it  in an online interview.
ÂI think Columbia would love to keep the franchise going with three new ghostbusters..you know.. using us as metors , cameos in the movie… I dunno, and we are developing …there's a concept for a third script , the studio might do..right now there's a big negotiation …going on the series..the movie consequently..if the deal can be made the movie can be made, we dunno if the deal can be made.Â
This is apparently the storyline of the would-be sequel : Dr's Stantz (Aykroyd), Spengler (Harold Ramis) and Zeddemore (Ernie Hudson) cope with Venkman's (Bill Murray) departure. They recruit a group of young bucks and try to deal with a new wave of spooks, who are being ejected from an overcrowded hell by that looks exactly like Manhattan. Louis (Rick Moranis), Janine (Annie Potts) and Dana (Sigourney Weaver) all have cameos, while Venkman only appears near the end of the film.
ItÂs a sad state of affairs when Aykroyd can get a ÂBlues Brothers 2000 made  now that, I would feed to TorangaÂs Gators  and not a second sequel to one of the most profitable films of the 80Âs.
The fans want it. Columbia. You listening?
Movieblog.com follows up with some thoughts on this:
Ackroyd wants a Ghostbusters 3
Unfortunately for him he seems to be the only one who does want a third movie in the Ghostbusters series. Bill Murray, Harold Ramis, Annie Potts and Ernie Hudson have all expressed their desire to leave it alone. However, Dan Akroyd really seems to want to do it.
The guys at Moviehole have it from Latino Review that he is really plugging the idea. It first started a few years back they report:
Aykroyd mentioned that he had an idea to bring in a new young cast of ÂGhosbtusters  Will SmithÂs name was mentioned at one point, probably after the success of ÂIndependence Day and ÂID4  and he says thatÂs still one idea he could consider  if only the rights holders of ÂGhostbusters would let him. At the moment, he says those that would make such a call  and heÂs not naming names  wonÂt let him.
Will Smith? Who else just spat their tea over the monitor in surprise? Thinking about that, if they bring Will Smith in, doesn't that just make Men in Black, I think that the movies would suddenly become very close to each other, and the beauty and fun of Ghostbusters would be lost in a sea of posturing and shouting. I really think that Smith lacks the comedic humility to star in a movie like this, although he could really cover that song well, “Busting makes me feel good…ahhh…yeah. I ain't ‘fraid of no ghost!”. Let’s face it, the original cast were fantastic, I doubt there is an easy way to replace them.
Interestingly enough Ramis is quoted as saying that Columbia pictures would love to do it, he seemed quite keen and they were developing an idea for a third script. He didn't know if the deal could be made though, and apparently it can't.
In a way I'm sad. Ghostbusters was a way load of fun (I even have the soundtrack! Ahem…ermm…who said that?), and Ghostbusters II did a good job of following suit, but making it in today's film industry with modern actors? I find it hard to see who could replace those guys, and even if I would want them replaced.
Casting call people. Any thoughts on who would make this work?
Just sad. You'd think Columbia/Sony would put more effort into trying to get it made. The studio's the more desperate one and only they can make the film. You'd think they'd add to the list of franchises that can still be useful.