http://www.ibloks.com/faq.php There is a lot of important info in the FAQ that tells you what iBloks will support and won't support (for now).
And as for games =)
"We're premiering with Sudoku - a puzzle game with 4 levels of difficulty and different puzzles within each level. Only with Sudoku can you add in your own photos and music to bring personalization of the game to a whole new dimension. You can share your game with friends and family, competing against each other to see who really deserves the bragging rights as the Master Sudoku!"
iBloks sounds really cool. I wonder if you can make your iBlok speak to you in the future.