Wasn't sure where to post this. So here seems appropriate.
Just thought I'd share my series in progress on custom fields and their uses. Its being published through small potatoes Wpdesigner. Find the first very basic tutorial here. The link to the next in the series is at the bottom of the post. I plan on going into much more advanced topics including: custom fields to control a store, icons per post with custom fields, etc. And of course any requests on how tos will be addressed along the way.