[SL] Blogger Support have great lists of tutorials:
A Bloggers Marketing Tools
Photography in Second Life
Photoshop & The Gang
Windlight Settings
Harlow Heslop also has some tutorials:
Newbie Resource Guide
Photography Tutorials
SL Tutorials
Video Tutorials
Other websites to check out:
It’s Only Fashion
Luna Jubilee
Youtube – Second Life Photography
Wiki – Snapshot resources
Blogging Second Life 