I was once the biggest fan of Worldmate and bought the blackberry and iPhone versions and pay for the gold membership, but I'm starting to move to the TripIt camp due to the excellent third-party support. If they came out with a true blackberry application, I'd never us Worldmate again.
On the iPhone there are many excellent third-party applications that work with your TripIt data, my favorite two, which I have purchased, are FlightTrack and Flight Update. They do the same thing, I can't decide which I like more.
I just use the free TripIt for the iPhone, which seems fine for my needs. Right now I just forward all my confirmations to both services and can freely use both apps. Until TripIt comes out with a Berry version, I can't bail on WorldMate completely.