So you actually went to E3 STK? Very nice. It's a true shame we couldn't meet up or something.
Yea, the SNK booth was alot smaller than it was last year. Last year though the bad thing was it was placed right next to Square/ENIX which overshadowed it so the nice part about this year is it got it's own small private room.
Metal Slug for the GBA looked like it was about 30%-40% completed...but from what was shown, it runs beautifully. They're not simply porting it from the Neo Geo to the GBA, it looks like they're building the game from ground up which I think is a great move.
They also had Metal Slug Anthology showing for the PSP. Again, this game seemed like it was about 80-90% complete. All the ports were very faithful to the originals. The games that were included on it were 1, 2, X, 3, 4, and 5.
Finally, they had KOF 2006 playing...which I found to be fairly enjoyable. The new characters are a blast to play, especially Louise.
All in all the SNK booth was decent. They weren't aiming to be too extravegant like they were last year and I feel that they achieved what they wanted this year.