Beery, you may be able to get Test Match Special radio commentary over the internet. I know the BBC make it available online.. I actually listen to it while having the sound down on the telly.
http://www.bbc.co.uk/radio/
"Five Live Sports Extra" carries the Test Match Special coverage. The Aussies have it relayed via ABC radio. Ideal if your browsing the net and want something to listen to. Play begins at 10:30 BST so I guess thats ~5 or 6 hours earlier for you. Radio 4 and 5 may also be covering it too apparently but Sports Extra would be the place to start looking, or listening.