Useful Apps so far :
MemMaid : Speeds the phone up no end.
PHM Regedit : Registry Editor
WiFiFoFum2 : Wifi Hotspot finder.
Handyswitcher : Great for actually having the ability to terminate apps rather than going into "Running Programs".
I forgot one!
Omap Clock : Allows you to boost the speed of the Omap CPU in the HTC wizard devices. Seems to work ok ATM, ive upped by clock from 195Mhz to 216 atm, goignto turn it up 5Mhz every day or two to test it.
Ill post more as i find them