Jamerica is exactly what I'm looking for in a restaurant. Sequestered in the eclectic Willy St. Neighborhood, it's a very tiny slice of Jamaica right in Madison. My girlfriend and I sampled some dishes and tried some appetizers and the food was impressive to say the least. I'm a big fan of Jambalaya, and while the taste can often range greatly, they have hands down some of the best I've ever had. Not a fan of Jambalaya? Try their Jerk Pork, very tasty and the sides that came with it were fantastic as well.
The building itself is very small, but when I want to go out for dinner with my girlfriend or a small group of friends, it provides the ideal setting. There are only 4-5 tables, and the total size is something along the lines of an average living room. They have a beer/soda cooler where you'll find a curious array of different Jamaican brews, all of which I tried sparked conversation and sampling around the table.
The only cons I can think of are the price and the service. The waitress was nice and friendly, but didn't do much beyond that. The presentation of the dishes was also equally plain, but that's probably suitable given that the establishment is looking to give it's patrons a sampling of true Jamaican lifestyle. Too bad the price can't be that way too, dishes are about $15 a plate, but at least they don't leave you hungry.
Overall great place, I'd highly recommend it.