I have the most amount of experience with MySQL.

I'm not that familiar with security hardening, I've never used SELinux but I can learn. (Not like I have a job right now.)
I do know how to fix SQL injection/XSS/buffer overflows, etc. if I have the source, of course.

I must say that I'm available 24/7, and I have a "wake up" url on my server I can give you that when accessed through your browser will try to wake me up with beeps.
(Abusing is not amusing.)

PS:
I live in the Netherlands (timezone: CEST (UTC+02:00) right now, CET (UTC+01:00) during winter)
I'm on Freenode 24/7, highlight me or send me a private message there and I'll respond ASAP.
(Also: I'm taking lessons for my driving license, I should be getting my license in about 3-7 weeks.
So if physical access is required to a server hosted in (or near) the Netherlands, I can drive there 24/7)