I installed Cyanogen Mod on my previous G1, was not really impressed. Sold out G1 after I got Galaxy.
Also installed Cyanogen Mod on my brother's Nexus One, but looks like Cyanogen has some problem with Radio part. When GPRS is on and you are downloading something (like a 5Mb mail attachment) and someone calls you, it appears to him that you are powered off. However you can make an outgoing call during such download.
Can you do me a favour by checking this on your Desire (if you are still on Cyanogen), I want to make sure if it is a problem of Cyanogen MOD (in general) or only a problem of Cyanogen for Nexus One , or our Nexus One itself has some problem
BTW: Can we communicate on email (I think nobody here would be interested in our discussion on our mututal interests)