Advice on recording tomorrow's podcast? 

Tomorrow we're doing a live Rebooting The News podcast at the SF Hilton. It's going to present an interesting challenge because it will be in a room with a number of people talking, and without spending a lot of money on new equipment, I have to get them all on the recording with a single mike.

Which leads to this: omnidirectional microphone.

I'd like to have the room set up as a big conference room with seats around a table, and a single microphone in the middle of the table.

There will be no time for sound checks, it has to work the first time.

Whatever I buy has to be here by tomorrow mid-day. If it's not here, we'll have to go on without it.

It would also be nice to webcast it through BlogTalkRadio and perhaps Ustream or similar services.

One possibility, admittely low-tech, is to have everyone call in on their cell phones!

Any advice people have would be quite welcome.