This is good because its a fantastic way for people to make really significant contributions, regardless of expertise.
But the problem arises in that its not unrealistic to expect these volunteers to need some advice/assistance during testing. Someting more immediate than email.
Testing IRC Forum
What about setting up an IRC forum, specifically for the duration of acceptance testing.
This forum could be a place where testers can quickly ask questions to keep the testing moving.. i.e. 'How do I do X' or 'What is Y for?'
For this to work we need to make sure there are people in the room who can answer, so what I;d like to propose is...
Could we get the more experienced/senior developers in here to, for the period of testing (about 2ish weeks) to agree to some kind of rota for attendance?
i.e. If I could get some volunteers to agree to be in the room on certain days/times in advance (just keep you window open to one side) then that would be a great help!