Hello!
I'm the guy from the SourceRuns team, and I'm working on that Half-Life 2 re-run.
It's so nice to see that people here appreciate speedruns, because we've been getting a lot of flame comments on our Portal run that we released last year.
Just wanted to drop this, in case you haven't seen it yet
https://docs.google.com/spreadsheet/ccc?key=0ArlWbN9z_WHqdHZIemxZamp2ZWx0R2VCYm51V2VqLUE
It's our timesheet: all the map times we've done so far, so you can compare how much faster we are than HL2DQ.
Also, we have a little Wiki set up. You might want to read that as well, because we provide short explanations and how-to's of various tricks we do throughout the run.
http://wiki.sourceruns.org/ Check it out! :)
If you have any questions, feel free to ask, I'll answer them if I can :)