SendHub (a YC company, I think) seems like a good choice right now. We left Phonebooth.com for SendHub and are fairly happy, though we're still waiting for a c

SendHub (a YC company, I think) seems like a good choice right now. We left Phonebooth.com for SendHub and are fairly happy, though we're still waiting for a couple of features like which line was chosen from an initial menu.