Best Calendar and Bulletin Service for our Office?

Hey All,

I work in a mixed office (mostly PC, but a few Macs as well). We have about 12-15 employees and are looking for the best way to have one consolidated calendar, bulletin board, etc that we can all easily access.

Obviously if we were all Macs we could just sync up an iCal, but that's no in the cards. So has anyone used any programs or web services (preferably free, but willing to look at anything) that handle this kind of thing.

Really, we need to be able to see various individuals' calendars, perhaps have a bulletin board for important notes, and maybe one singular calendar for scheduling the conference room or something like that.

Any input would be awesome... thanks in advance!

Yea... I've actually used basecamp a few times on various projects and it's a great tool.

However, I guess what I'm looking for is more along the lines of an online, "share-able" version of iCal or the calendar in Outlook. That's pretty much it. No need for delegating tasks or having milestones and deadlines and such. All the stuff basecamp does so well.

I poked around a little on Google Calendar and that's certainly an option, but I figured I'd like to get some input here first. Has anyone used any other solutions that have some more functionality (like perhaps file sharing - we can host the files , to-do lists, or anything else that might be useful)?

Thanks.