CP24's website has a lot of video from the Ontario PC Leadership Convention.
Also, Jonathan Colford's website has a bit of a convention blog with what happened at the Crowne Plaza gathering. Check out the postings for September 18th and 19th.
Don't bother looking for something from the National Post's Andrew Coyne, even though he was there, too... looks like his blog site has kicked the bucket.
I'll add more links here to any good stuff on the convention that I happen to find. For my own blogging, see below.