Job markets go up and down.
When I finally left the libraries I was in a position where I worked 39 3/4 hrs a week and no benes. (it was less than 40 hrs a week....) There were other folks in the same library who'd been doing that for 5-10 years and still had no benes. Jobs were tight.
Couple years ago I was *this* close to heading back to libraries. In my neck of the woods they were DESPERATE for science librarians (that's my "thing"). And there were full benefits!
If the market looks good now, it might be different later; if it looks bad now, it might be different later. Follow your passion! The jobs will be there one way or the other. 
Oh, and being "older than average" counts as a bonus as a newbie in library jobs. Breadth of knowledge and experience in the real world is far more valuable than just years-in-the-library.
Last edited by KnottedYet; 06-11-2008 at 05:48 PM.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson