http://www.slworkexchange.com/

Hire or be hired - this web site links tasks wanted with skilled workers. The site takes a commission from each job. Check it out!

The only way to register for work is to visit an in-world terminal, though. Find one at their headquarters at:

Silicon City (205,160,28)

The clue is this: walking up to avatars and asking, "Hey! Hi. How can I get a job?" marks you as a real newbie - a clueless newbie to boot, actually. Which is okay, we were all newbies once, and no one is going to hate you for asking.

One of the more active Job and Employment posting areas is on SL Exchange!

Check it out:
http://www.slexchange.com/modules.php?name=Forums&file=viewforum&f=16