It seems like the Stack Overflow Careers really requires you to participate in Stack Overflow and related sites.
Wouldn't it be better if it also pulled in other things like mailing list participation, open source project participation etc?
For example, Ohloh tracks all kinds off stuff that would be useful to a recruiter. For example here is the Ohloh profile of Stefan Küng, who works on TortoiseSVN
You can see all the projects he contributed to as well as the languages he contributed in.
All of that relevant experience would be great if brought into Stack Overflow Careers.