As we all know, HTC and Sprint borked downloads for apps like Rhapsody, Mog, Thumbplay.
I recently ran across the subject and i found a fix. It is very simple.
1. Get your MSL, There are many ways, call Sprint, Download the app MSL Reader from the market, CDMA workshop
2. After you have your MSL go to your phone and type ##3282#
3. Click Edit Mode
4. Click Advanced
5. Scroll down to HTTP PD Proxy Port & HTTP PD Proxy Address
6. Change HTTP PD Proxy Port to 0 (zero)
7. Change HTTP PD Proxy Address to 0.0.0.0
8. Go enjoy Downloads and a .20-.60 mbps increase in 3G speeds!
-All credit to original finder of this fix, i am just passing it along and found the speed increase. Also when you flash a new rom it will back to old settings so remember to re-apply and it wont make you more vulnerable to anything.