I'd really like a chihuahua too...I think a white-knuckle dog would be just a hoot.
I think I'm finally resigned to the fact that I can't deal with Fritzi. He's not really fully housetrained, for one. If I'm paying attention, he does ask to go out, SOMEtimes, but usually he has to be reminded, like a little kid...otherwise he goes in the house. That'd probably be OK for someone who was home all day, but not for me.
And he's a whiny, nervous, clingy little thing. Drives me nuts. Fiona is small, but she has spunk.