Jameco is very much alive! However, My bank recently called to verify some purchases with them. They claimed that my regular transactions with such a company were flagged as suspicious. I suppose the everyday household is not impulse buying this stuff as I do.
Yep, they're around and seem to be doing reasonably well. I buy a lot of electronic components from them, and so do a lot of the other folks at Splatspace (the Durham, NC hackerspace).