I would like to set up a shared calendar system for our office of 4 people. Optimally, I would like all (or as many of) the features from Exchange but built in such a way that it all ties together with our Snow Leopard/Lion machines.
What solution should we go with? I think these are our options:
Lion Server: I tried setting this up last month (after launch) and it was a disaster. It was terribly slow on our MacMini server and Wikis just stopped working suddenly, which worried me that other services (such as calendaring) would stop too.
Exchange Server: Lots of overhead and pretty much overkill, as we already have an email solution and wouldn't use the other Exchange stuff. That said, I guess you can get hosted Exchange accounts for $10/mo from RackSpace.
MobileMe: Not really shared calendar because I can't easily see a coworker's schedule.
Google calendar: No.
Apple fans, help me out! What are your suggestions?
If I'm making incorrect assumptions or completely glazing over something please let me know!