Looks like we're getting to the stage where serious apps and games can now be written in Python for S60 - witness Jomtris, released today, complete with (late) festive theme, which works on all devices with portrait QVGA displays. Screen and links below.

This free Tetris clone features a festive background and simple controls. The game was developed by Jouni Miettunen and requires you to have Python installed (on the installation disk). 

Download Jumtris v1.51 Christmas Edition here
Download Python v1.4.5 here

(via Symbian Guru)