I have a much simpler answer for you. I don't know HOW many times I need to post this information I feel like I've put it in 15 threads asking for stock launcher lol but here you go. No ADB required, etc.
You can find the mod here in the Nexus S forum: THREAD
Download the first file and flash through recovery. You'll lose all your homescreen placements and widgets you have set up with ADW.
If you want to flash this over nightlies every day, you need to follow a specific order to not lose your placements again.
1) flash CM7 nightly via recovery (not ROM manager)
2) after install, stay in recovery (don't boot up into the ROM!), go to Advanced > Reboot recovery
3) after recovery reboots, flash the launcher mod
Just in case you're lazy, I've attached the file also.
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