Yup, a great idea. I suggested a news portal a while back and this joining of forces sounds like it'd be an even better idea. The classic Amiga community is too fragmented, it'd be nice to have a central location that covers the major events in the scene. And lobbying publishers and programmers to release their software freely to the public is a great idea, too. Yes, we already have sites like BTTR and Ami Sector One, but a central web site covering these efforts as a whole, professional in design, might help encourage people to release more of their software.
EDIT: No PhpNuke! Too many sites use it.