Via The Church of the Customer Blog comes a link to an essay by Jeff Barr about presenting in Second Life:
http://www.jeff-barr.com/?p=707
We might also use it as a guide for getting comfortable in SL as more librarians come into the environment:
Spend time in world
Attend some events
Master the basics
Dress the part
(This include some useful links, including a links to SL Clothing sites. I think my black shirt, jeans and flip flops are getting tired.)