UPDATE 8/16/2010: With Android 2.2 Froyo, there appears to only be one calendar application again.  The corporate and google calendar applications are now merged into one.  As far as I can tell, it pulls from both the google calendar and the microsoft exchange calendar.

–Ben

ORIGINAL ARTICLE:

So, I just had a stupid problem today.  I thought there was only one calendar application for Droid.  Acutally, the calendar application is for google calendar.  The corporate calendar syncs with Exchange.

Luckily, if you want your exchange calendar to sync with google calendar and your calendar application, there is a way.  A way by google.  Download and install Google Calendar Sync.  It will allow one-way or two-way sync to your google calendar.  Could be very nifty.

Otherwise, you can stick with the corporate calendar app native to Droid.

–Ben

Resources:

Google Blog on Calendar Sync

Cell Phone Forums on Sync