There are step by step guides for Ubuntu Servers [1], there is this person franky1 mentioned setting up a node for you for a monthly (at least thats what I remember) payment.

I personally however had the best experience with just doing it myself. Get a cheap VPS (>=2GB Ram and >=40GB HDD) and start. If you have questions just ask in the tech support section or if its not actually related to bitcoin ask in the board/irc channel/mailing list for the tool you need help with.

[1] e.g. http://charlieshrem.com/node/