Species Identification - small insect: is this a bed bug?
This is a really old thread but just in case someone happens upon it, this isn't a bed bug.  

I am not an expert but it looks like it's likely a book louse or psocid.
See comparison photos of unfed first instar bed bug nymphs vs. psocids/booklice here: http://bedbugger.com/2008/03/04/booklice/
It's all about the shape of the head and body.