No, don't get Llamacraft. There is a mod that includes Llamacraft but also has admin commands and a player limit.
This to be exact.
Infact, I'm hosting with it right now. 24.113.19.180:6726
1up:
http://www.mediafire.com/?15k00vg5ow53jxjOrthone's download, premerged into minecraft_server.jar with pregenerated files (not a world, just prefs and the like) plus a world selector.
I figure, I didn't make this world selector for nothing. Note that the selector won't work crossplatform because it was primarily an experiment to test a gamemaker program I was toying with. It'll only run on Windows and it's reliant on the start.bat file.
Later I might make a proper version that would launch from either jar or exe where found, possibly even execute the jar inside its own console (much like the current executable version, just with a world selector and other stuff included). First step towards that is learning something I could actually compile, yaaay
Edit: Almost left up version with people preinserted as admins. What a fiasco that would've been, with all the... me and friends having red names but not really knowing what to do!