CyaogenMOD v5.0 for Google Nexus One v5.0.2 is released and available on AndroidStory. This latest release is is NOT marked as Beta anymore so I would assume that it’s considered stable.
CHANGELOG
—- 5.0.2-N1
* Fixed Launcher2 FC on start
* Fixed usb-tether-over-wifi
* Disabled menu-to-unlock to match the shipping version
* Readded the wireless regulatory domain setting, not sure why this was removed by Google
* Enabled support for PPTP while tethering—- 5.0.1-N1
* Use ERE27 in build fingerprint so protected apps work.
* Launcher fix from ChainsDD (thanks!)
* Readded VisualizationWallpapers
* Update your gapps to the ERE36B-2 version to fix NetworkLocation and VoiceSearch.
Head over to Cyanogen’s AndroidStory Developer Homepage for more information and downloads