1. published 3-9-2010
Guide to Rooting Android 2.1 on a Motorola Droid | Droid Life: A Motorola Droid Blog
#1 was published on 3/9/2010 while #2 was on 5/6/2010. It seems #1 doesn't require SPRecovery installed.
My understanding is SPRecovery would prevent future OTA update from verizon. I am looking for a fallback plan to "undo" the process and resume receiving OTA if needed.
If you are familiar with them, please share your insights.