I'd be interested in playing maybe two 3-hour sessions on the weekends. I'd like to knock down a smaller game in a single weekend but that's just my preferance.
Also, to other Americans, note that On Sunday Nov. 6 @ 2 a.m. we switch to daylight savings time, which shortens the lag between US and UK time by 1 hour. So if you are in the central time zone, the lag would go from 6 hours to 5 hours.
edit: I have that backwards. We're going to move back to standard time, so right now central time US is GMT-5 and goes to GMT-6 Nov. 6