Plaxo
I have been using a very geeky and unique method for getting my Google Calendar to work with both my Mac and my Blackberry. I wanted to make sure that read and write worked both ways. Blackberry to Mac, then Mac to GCal and back again. This makes it too easy! I almost feel bad about dropping this old method after putting in so much work, but this service helps linking all of your services such as these together. It does it so well and is so easy I am recommending it to everyone I know. It is still in beta, but what web 2.0 site out there isn’t these days!
