The chats will be at about 20:00 (8pm) on Thursday and 17:30 (5:30pm) on Friday, and will run for up to 90 minutes. There is no separate agenda for the two, it's just running at different times to get more people involved. I know this is short notice, and there will be more opportunities to share ideas later, I just wanted to get the ball rolling quickly. They will be held in the channel ##disabledunion (note the two hashes, ##) on Freenode - the web interface can be reached at http://webchat.freenode.net/?channels=%23%23disabledunion&uio=Mj10cnVlJjM9ZmFsc2UmOT10cnVlJjE0PWZhbHNl25
This information has also been added to the original post about the live chats.