I hung out for a little while tonight with a guy I have a bit of a thing for. This is really only the second time I've had any one-on-one time with him. He showed me the apartment he's staying in for the next week, and asked if I wanted to drop by for a drink or to watch a movie sometime this week. Since I would feel weird just showing up, I asked for his number, and since he doesn't have a cell phone (or a land line because he's only in the country for a short time*) he gave me his email address. My question is, is there a good amount of time to wait before I get in contact with him? Should I email him tonight? Wait a day? I don't want to waste time since he's not here for that long, but as usual I don't want to seem to eager. suggestions?

*(about the long-distance thing - if anything does come of this, I'll be abroad next year and as it turns out, only a 3-hour drive from where he lives. The other guy I'm interested in lives a block from me, but next year we'll be both be gone - two difficult situations - but this one seems more promising in the distance department.)