Had 2 missed calls from this number this weekend--Nov 1 and 2 2008.

I think in the telemarketing world, they use automatic dialers, and sometimes if you pick up real quick, there is a pause.  I think it is because the telemarketer is expecting a cue, and doesn't hear it if you answer your phone too quickly.  Also, if you don't answer, the machine starts to call the next number.  That is why they don't leave messages--wastes too much time.