Pixel is a good one. Ruby (from Ruby On Rails, or Agent Ruby from ATI). Dot, short for Dotcom. Effy, short for effing computer. I like I/O (pronounced I-O), as it sounds all Greek and sophisticated.
Oh! I like I/O. It could be the moon "Io" or a computer term, depending on the girl you are trying to get to stop at the dog park and say "Awwwww" to it with. LOL
**Edit**
If you are going to go down the "Try to get a female's attention at dog park" route, then I would prepare multiple names (WIN WIN) only kidding
heh heh heh, we had a dog named deeogee *use hooked on phonix... lol, D.O.G* but anyways... being a sheltie MOSFET lol, maybe I/O, I have no clue otherwise