This Friday's Steam Whistle Unsigned is already the fourth in a series of independent music showcases at the Roundhouse, but it's the first we're really excited about. Really excited. Check out this lineup: The Carps are the best thing to come out of Scarborough since... er... hmm. Right. Anyway, the punk-soul duo recently opened for MIA at the Kool Haus, and if they're good enough for Maya, they're good enough for you. Opopo sound like......