I don’t use Google Calendar myself but I do have a BlackBerry so I’m passing this on for other BlackBerry owners who do. Google has released a utility for BlackBerry owners that keeps the calendar on the BB synced up with Google Calendar.
"Using your BlackBerry smartphone’s native calendar, you can now accessyour Google calendar even when you don’t have network coverage and bealerted for upcoming appointments with sound or vibration. Your GoogleCalendar stays synchronized whether you access it from your computer oryour phone. You can add or edit entries right on your BlackBerrysmartphone or on your Google Calendar on the web."
On our recent trip Kevin and I compared the size of my BlackBerry 8830 with his iPhone and surprisingly it’s not much bigger.