I'm linking as many of the XDA Guides here for us Zio owners. This way we don't have to go hunting for them if we need to use them.
[GUIDE] ADB, Fastboot, and Nandroid for Noobs
Flashing Guide - Android
[TUT]Complete upgrading guide(root, unroot, flashing ROM & updates)
SD Card Buying Guide
[Tutorial] How to back up your ROM - A comprehensive guide.
Guide to compiling (covers cm7)
HOWTO: Unpack, Edit, and Repack Boot Images
If any of these don't help or pertain to us Zio owners let me know and I'll remove it.
If you have any guides that you find that aren't here post the name with link and I'll add it to the my thread.
Hope some of some of these guides help those that have any questions. They have helped me with all my questions and concerns...well most of them.