1. I doubt we'll 100% complete it - if the team stays even after SC2, then we'll see - but you can expect a fun and stable version of Wc3:WoW (not a public beta, but an actual demo) possibly in two years. I don't know. Progress always jumps up and down, so if things stay up, in two years, you can expect a version you might not want to miss. As for the public beta, not too long I hope. I don't want to make any promises, since we've missed just about all of them in the past.
2. When we reveal more of the project - probably when we have an ingame video ready - I expect more people to be interested since we'll show off the goods of the project.
3. Heh. It's about time to show off another video. But unfortunately, progress is too slow and there's still much to get done. I'll try to work on the terrain more to refresh everyone's anticipation, though.