[read the Windows Store blog post]
[see the vid eo about the contest winners]
[the contest site also has a nice summary]
If you've downloaded the Consumer Preview, you can find Physamajig in the Store under the Entertainment Category:
I'll be continuing to add some goodies to Physamajig, and here is a little sneak peek of something in the next version: Textures! I really like how these textures make your creations seem more toy-like!