Being the sole Mac user in a Windows environment, I have a need to keep the corporate Exchange server updated with my appointments. I have Entourage (2004) for this purpose. I hate Entourage and much prefer to use iCal as my 'real' calendar, only using Entourage to update Exchange. This means that all iCal appointments have to find their way into Entourage.

Until recently I used a commercial Applescript for this. However this was last updated some years ago, has numerous Leopard issues and is slow and increasingly error prone.

I stumbled across XC Connect and it's beautiful. I run in a slightly unconventional way I suspect. I am the sole user and use the client/server version on one Mac. To do a full sync I have to perform two operations; sync Ical to server, then sync Entourage to server. However, each takes seconds (compared to sometimes an hour or more for the old script) and is just a joy to use.

Had to use support a couple of times to get properly configured and they were responsive, helpful and generally first rate. Couldn't recommend more.