You mean the newton interface?
I just got some replies in the 'water particle bitmaps' thread. Particles will be in this release. I've decided to release everything (updated demo 1, demo 2, demo 3, tutorial) at once. I expect completion in a few days or so. Sooner if i get my other projects finished. Sorry about the release getting delayed.. New projects keep popping up!

Would you rather i modify your buoyancy demo or make an entirely new one?

[EDIT]Well i have actually already modified your buoyancy demo, i was just wondering whether you'd rather me make a new one.