Terrablox is a 3d game like minecraft but cooler you can read more about it here:
You can share you're designs / screenshots / texture packs / characterskins and submit ideas in the forums!
Thats all for now!
If you create a video of Terrablox, obviously you can upload it yourself wherever you want, but you can also send it to SteveTzag at "firstname.lastname@example.org". Give your video a name and say how you want to be credited, and Steve will handle the uploading for you at www.youtube.com/TerraBlox.