It feels like you've forgot to include most important pages for programmers such as github.com and bitbucket.org. I'd suggest allowing people to specify their own fields. Right now there's no possibility to specify my own homepage (just blog url).
That's a good idea, right now it's all static columns. Adding bitbucket and github is easy enough, allowing arbitrary fields is a bigger refactor.
Also it would be nice to add StackOverflow. Adding custom fields should not be difficult too.