Thunderforce VI for PS2 got announced while my HD was down, so I didn't get to mention it at the time. But I don't think everyone has seen the videos yet...if you haven't, check here (direct link). Still no word on the developer, aside from Sega director Tetsu Okada. The Tecnosoft site has little information on it, but does link to the Thunder Force VI page, and also say that licensing for existing and original Tecnosoft titles has begun. Looks like they're planning something new, as well.
I must admit that right now the game isn't looking so hot. Seems rather uninspired visually and in terms of the weapons available, and that rockin rock guitar in the trailer isn't really helping get that old Thunder Force feeling back. Time will tell though - the perspective shifts are nice at least