I've found that spacebar=pause. Are there any other particularly useful keyboard shortcuts (WinXP)?

Stellar game, btw!!

yes, there are lots!
space-pause
c-collectibles screen
d-details screen
t-tech screen
esc- "go back"

plus all the number keys take you to different places...not sure exactly the point of that yet, but it helps me get around quicker than clicking and dragging :P

I'd imagine that the same shortcuts that were in VV2 are in VV3 (I could be wrong)

I do know that the number pad keys will move to a different area of the island

7-top left
8-top middle
9-top right
4-middle left
5-middle middle
6-middle right
1-bottom left
2-bottom middle
3-bottom right