in 770 version for OS2006 there is no sound, N800 version seems to work in OS2007 hacker edition including sound. Tried Bejeweled and it is painfully slow both with or without sound. Let's hope they will improve it a bit. Also stuff with native arm code (armlets) crashes the VM, tried Legacy game (crashes at startup) and Plucker viewer with SysZLib as armlet and it crashes randomly when reading compressed books.