If you’re a Mac user and a Blackberry user, you might like to know that there’s an update to the free PocketMac software which syncs the two. You can get it from the Blackberry.com site.
This is still far from perfect – in particular, it corrupted my Mac address book the first time I ran it, perhaps because the Blackberry went to sleep in the middle – I’m not sure. I strongly suggest you backup your Address Book and iCal before trying it for the first time – they both have easy backup options in their menus. I restored them, and did a one-way synchronisation, overwriting the Blackberry, which took a phenomenally long time.
Since then, it’s been fine, if not speedy, and it has a lot of features not in the earlier version. Most important for me is the ability to have just a subset of your calendars on the Blackberry – vital if you subscribe to many calendars belonging to your friends and family.