How can I auto-add or sync events to iCloud calendar?

[j.n.]

I use Outlook and Exchange at work and while Exchange syncs across my devices I would really love to use iCloud as well. My ultimate goal would be to add an event to my Exchange calendar in Outlook (or iCal) and have it automatically add the event to my iCloud calendar.

Does anyone know a way to automatically add or sync calendar events (contacts would also be nice) to my iCloud calendar (and contacts)? Kind of like a Google Calendar sync but for iCloud.

I've got both a PC and an iMac at my desk so I can use either a Windows or an OS X based solution if someone's got one.

Thanks in advance,
J.N.