I spoke for just under an hour at BarCamp South East on the subject of WordPress MU and WordPress.com on Saturday. A number of people have enquired about online video and podcasts of the talk and thankfully they're starting to appear.
Conor O'Neill posted videos of my talk on his blog. I talk about scaling WPMU, partitioning data, hashing the blog_id, getting past the 32,000 file limit of ext2/ext3, as well as working from home. I think I struck a cord with that because I saw many nodding heads in the audience.
I've linked to him from my post about the event, and as other media recordings are uploaded you'll find them linked there too!