From a Scientific American article:
"Probably not, although the folks at Slashdot, an on-line hacker community, did have a lot to say about Microsoft naming its computing language C#--everyone will argue about how to say “#” (“pound”? “hash”? “octothorp”?), except for musicians, who will pronounce it correctly at first sight as “sharp.”
http://www.sciam.com/2000/1000issue/1000cyber.html

More useless info about '#' ....
In German they call this ol' boy a Gartenzaun (a garden fence) or Doppelkreuz (double cross).
Kreuz is fittingly the word for a sharp in musical notation too :-)