there are certainly torrents available - search for cricket world cup 2007 - though the ones I found quickly are group game highlights only. pm me if you want more detailed directions.
There are some clips on youtube, though what exactly they all are I cannot tell you.
The site I use most for my information is:
http://www.cricinfo.com/
This site has live text description - which is usually enough for me when I'm not actually watching cricket.
I'm really not too interested in streaming sites - it is the middle of the night here when games are played and the Oz games are all live on FTA TV, so I can sit in the dark in my lounge room and watch
There are streaming sites like:
http://www.willow.tv/EventMgmt/Default.asp
but it doesn't work in Oz (says my IP address is not valid). This is a pay site though and that might not be your thing...
Obviously our local TV and newspaper coverage in Oz has pretty good coverage. Being defending champs and looking most likely to retain the title might give you an understanding of our interest in cricket
News sites like
http://www.smh.com.au and
http://www.abc.net.au/cricket are worth a look for their cricket coverage, though these will be pretty Oz centric.