Internet censorship and bittorrent/soulseek/p2p

So, the "live" internet filteringcensorship trials are going to start in the next month or two.
I noticed that some of the trials include the filtering of peer-to-peer traffic (ie. BitTorrent, soulseek, etc), which the govt has said it wants to be able to do.

Does anyone have some more info on that aspect of the filtering?
I'm curious to know how they will be able to tell if the content is "illegal or unrated" content. To some degree I think it would be very easy for them to default to "unrated" if they can't tell, and then to block it - since after all, even if you're just downloading Top Gear from the UK, if it hasn't been released in Australia yet then it would be "unrated" here since the ACMA hasn't classified it.

But mainly, I'm curious to know what sort of filters exist that can operate on something like BT where there are so many small, randomly ordered packets flying around; currently BT operates on TCP but the newer versions are already moving to UDP.

Also - how is it possible for filters operating at that level to NOT cripple the performance? :(

[Edit: Have found this article on filtering bittorrents.]

Shipping.

The Amazon .CO.UK! order I placed two days ago (Wednesday) has already arrived, today. Internationally.

The order I placed with www.sydneycitymotorcyles.com.au 8 days ago still hasn't arrived. Grrr! Have they even posted it yet??