I've taken my Minecraft server offline. After doing a hardware swap, I've found that I hadn't planned for someone to be on it for nearly the entirety of the work day/work week, so it was interfering with things that I needed to do to the machine on an emergency basis. Because of extra maintenance required that hasn't been completed, I feel it's better to take it offline than it is to work around active players. One, it means I don't have to remember to restart Minecraft every time I reboot the machine; two, I don't have to schedule taking the system down to give players enough time so they may finish up what they're doing and log out. I imagine it's also frustrating for the people playing to be doing so on a server that is likely to be down as often as it is up. Unfortunately, this was a case of bad timing; hardware failures happen, and I have business to do. Some things take priority over Minecraft, I'm afraid.
I will resume the server at some point in the future following a series of intermediate upgrades. However, the future incantation will be strictly invitation-only, and only for people I know (friends, former guild mates, etc) who also understand that the machine is hosted from a home office, isn't guaranteed to be available 24/7, and can be taken down at any time for any reason.
If you need a downloadable copy of the world you were working on, please let me know, and I'll provide it. If you need a server that has guaranteed availability, Mojang is running Realms servers for ~3 people starting at $2.99/mo (USD), and you can find an assortment of other servers in the same price range. Many of them allow you to upload your own worlds.