Kayak.com has released a great application that allows you to search, book and compare pricing on airlines and hotels all from within one application on your BlackBerry. I tested the application out just to see how well it would function and what type of results I would have with it, and I'm pleased to say it works great.
Best part for me was it actually included Canadian listings and recognized all major Canadian airports. The application is very light weight and looks nice considering, now I have nothing against using say--Worldmate, but some features of Worldmate are paid features that also get downloaded when even using the free version so it makes it a heavy application. This is a great alternative with a little bit more functionality added, Kayak supports all BlackBerry devices 81xx series and up.
[ Berry Review ]