Probably the easiest way I've seen yet. A few things to consider, it's probably best if you're already restored to your 2.0.1 backup. If you have a 2.0.1 ROM w/2.1 apps installed, you might revert to 2.0.1 stuff first.
It does work though. All back to stock, no need for extraneous commands. It doesn't screw with your /data so your apps and such remain intact. I like this because I can do a Nandroid backup right after rooting/installing SPRecovery, and then this update.zip will have all my pre-rooted apps/settings intact.
http://downloads.sholes.info/update.zip
This is thanks to Berzerker over at Droidforums for pointing me out to this.
*Easiest* way to get back to stock (No root, no busybox) - Droid Forum - Verizon Droid & the Motorola Droid Forum
It does work though. All back to stock, no need for extraneous commands. It doesn't screw with your /data so your apps and such remain intact. I like this because I can do a Nandroid backup right after rooting/installing SPRecovery, and then this update.zip will have all my pre-rooted apps/settings intact.
http://downloads.sholes.info/update.zip
This is thanks to Berzerker over at Droidforums for pointing me out to this.
*Easiest* way to get back to stock (No root, no busybox) - Droid Forum - Verizon Droid & the Motorola Droid Forum