quite a bit i've seen posts asking how to remove odyssey client from the Axim. I did some extensive research and a few hours coding, and came up with OdysseyKill.
I was unable to test it on the emulator, since that doesn't have odyssey, so i cringed and tested it on my X30 (witha good backup). Whammo! no more odyssey! 2 meg more for all the other apps i'd rather use.
Enjoy.
http://pocketpcapps.net/odysseykill.aspx