Hmmm, I seem to have lost 3G after flashing Cyanogen's v4. You still got it mrk?
EDIT: Doh, just had to set the 'APN' up - I've build tons of PCs but phones are waaaaaayy more complicated, learn new stuff everyday I guess
This Cyanogen ROM seems an improvement over the stock version - you get a few preinstalled apps (for Office and PDFs), multi-touch zooming in the browser, a handy reboot button when holding the power button and a few other tweaks. Now I've fixed the 3G issue and got the Hero keyboard working properly, I'll have to have a bit more of a play!