I’ve finally brought my old but still frequently accessed blog post on taking pictures in SL up to date. I’ve added small bits of new information thoughout and put in a new section on resolution and image quality. The section on aspect ratio got a major rewrite to reflect the changes in the SL viewer since then. Have fun!
http://drickenbacker.wordpress.com/2007/08/27/some-hints-on-taking-pictures-in-second-life/