Amount of raidstats-logs the last few months has made the realmplayers servers heavily overloaded. Someone reported it on the realmplayers forum (which is accessible when the actual site is down) so just report it there if the website gives http errors again. forum: http://realmplayers.com:5555/
It is also a good idea to report on the realmstats forums when nostalrius raid data exept from the players who are themselves uploading goes missing. A raidstats server restart fixes that issue.
As Sethzer said, posting on the forum at http://forum.realmplayers.com Or poking me on twitter https://twitter.com/realmplayers is probably the best way. Usually this is just a case of website service having too many errors due to heavy load and i have to manually restart the website service.