Greetings, I recently bought an old Mac mini on eBay with OS X 10.6 client. I am actually planning to use it as a server. I have three options: Install Windows Server 2003 R2 or 2008 (I have licenses for both and am currently using neither) Install Ubuntu server (or even desktop) Keep OS X client There exists the fourth option of buying OS X Server, but I really would prefer not to do that. I am familiar with Windows severs from work, but I would prefer not do to do that, especially since I use Macs at home. I am familiar with setting up servers (especially Web servers, SSH, and ... well, not a whole not more) on Linux, as well, which is why I point it out as an option. However, I would really like to keep OS X on the machine and add what I need to make it a better server. (Most things that run on Linux can be run on OS X, and several are even included in the client version--Apache, for example.) Does anyone have tips on this? Off the top of my head, the only two things I would like that aren't included are something like iCal Server (especially the Web interface of iCal Server 2 if something like that exists) and iChat server (is this just an XMPP server?). Mail would also be nice, but if nothing else, I'm sure I can get the tools I use on Linux to run on OS X. I know I can do Web and file serving already, as well as some of the other features OS X server supports (although perhaps not as elegantly), like wiki serving. I'm also curious what the "mobile access server" is or if there exists anything similar for OS X client. (I'm also considering running Ubuntu in a virtual machine and keeping OS X for...I'm not exactly sure what, other than to be a host OS. But, again, I'd like to stick with OS X as much as I can, especially since I know even the client version includes some things I like.) If anyone has tips, that would be great. Thanks!