The TODC site was updated with this news (albeit a fine translation from http://www.dcevolution.netfirms.com )

Here’s the list of whats new in 2.1
-sound emulation
-safeguard of the configuration on VMU and automatic loading with starting
-Your own personailsed image on the menu (file pcx on CD)
-Now compiled using kos 1.1.7
-correction of a bug of posting after exit of the menu

Theres screenshots and more on his site http://perso.wanadoo.fr/jplang/index.shtml