Barring my brother not getting up early enough to drive himself into work in a timely manner (meaning that after I get home from work, I'd have to take almost 2 hours of my evening to pick him up and bring him home), I'm available anytime from 7 PM CST to 11 PM CST most weekdays for a team match. From the 10th until I get knocked out of the Starcraft II tournament I probably won't be available, though.
Basically 6 to 10 PM your time, iirc. I'm not sure if you live where I think you do, though.