I like
Puppy and the Puplet
Nearly Office Pup, with two caveats: Puppy's designed to be run off of the live CD, so although you can install it to your hard drive, it's a little tricky (nothing
the right instructions won't get you through, though). Also, Puppy's networking isn't set up to remember wireless configurations very well, so if you use wireless, you may have to manually connect every time.
I've also been playing with
TinyMe, a lightweight derivative of PCLOS. It's pretty and quite user friendly, though when I tinker with it in VirtualBox (e.g., try to set it to auto log-in), sometimes I bork it.
# Edit:
You may also find
this review of interest.