We do daily stand-ups between 2 locations. At one end which is a large office, we have a MXL AC404 USB conference microphone on a table that people stand or sit around. People around the table sound great, and it is omnidirectional, so it doesn't matter where people are. If someone goes off to scribble on the whiteboard and is 8 or 10 feet away from the mic, you can hear him or her, but it doesn't sound as good because it gets a little soft. If you keep an eye out on Amazon, or use camelcamelcamel, you can find this open box for less than $40.
At the other end, we use a Blue Snowball because the standup takes place in a large open room and we want the cardioid pickup pattern so we don't pick up extraneous noise. As with the other microphone, sound quality is a lot better when you are near the mic. I had someone who spoke softly, and I always had to get her to stand in front of the microphone, but a fellow with a booming voice was ok from 8 feet away.