Here is the Data Service Governer Killer mod that the forums have been buzzing about for CM6.1.0 stable release. Credit goes to BThomas22x from this post: http://forum.xda-developers.com/show...43&postcount=1 All I did was package it up nicely for CM 6 users. Make sure you do a backup first and then flash the attached file from recovery just like you would a ROM.
Less than Scientific Data Speed Comparison (Speedtest.net app):
Before: 829kbps/479kbps || 891kbps/607kbps || 1019kbps/554kbps
After: 1691kbps/650kbps || 1239kbps/575kbps || 1148kbps/688kbps
If it matters to anyone, I'm running the 7.28 radio.
Edit: If you're cutting edge and need a services.jar that will work with CM nightly #184, scroll down to invisiblek's post.