Offhand? I think you are. You have a great intelligent, intriguing face, a range of expressions, an athletic figure.
But you're in Washington DC and I'm in interior Alaska, so I'm currently unable to demonstrate this for you.
On the other hand, most people never make any real money from modeling, but it can be a fun hobby, good for a few dollars here and there, as well as good for the ego.
You can find good photographers who do it mostly as a hobby (like I do) on SG in the Photography group, and in the hopeful photographers group. I'm sure fine art and pinup photographers would shoot you for trade in a heartbeat. I certainly would.
You can also go the Model Mayhem route, which will get you a lot of empty flattery and love notes from creeps, but if you can put up with that, probably some work too.
It's the fact that you have an interesting, thoughtful face that works for me. The combination of pouty/aloof and approachable smile is terrific. If you look at the current crop of hopefuls you'll see a lot of expressionless, bland, Myspace looks. I think some people like it, but it puts me off instantly.
Well, I hate to be contrary since we haven't met, but you are wrong there. You could model in a minute (even longer). You look like a natural to me. Nice to meet you, by the way.