I had some hard time recompiling my kernel to 1000HZ so I was looking for someone to recompile my kernel, made a topic on WHT, got a few replys. I didn't knew which one to pick, which one could I trust? Visited some of their sites and ended up choosing NIXsolutions.com, their site had a good look and seemed to be reliable.
After some e-mail I contacted one of the admins over MSN and they had the job done within ~2 hours, they where really helpfull and explained a lot of things over MSN that I didn't knew about linux.
If you are looking for someone to manage or fix your server, these guys are great!