I was standing talking with Marcia Akins and (I think) both Cathi Gero and Cathy Pountney at the last Whilfest, when Marcia uttered something about "...having a blonde moment". Due to that, she was the first person I thought of when I recently heard this one:

A blonde walks into a computer store and finds a sales clerk. She asks him where she can find some curtains.

"M'am," the clerk replies, "this is a computer store."

The blonde says, "Well, duh! I just got a computer and it came with Windows!"< rim-shot >