Ive got the blackberry 7100x series which has been around nearly 2 years. The latest equivalent model is the Pearl, which is much small and compact and has some technical improvements. You can get it from your service provider such as o2 or vodofone as an upgrade package of a couple of hundred euro approx. You will need to sign up also for a GRPS service package cost around 40euro per month which gives unlimited email but phone calls are at normal cost.
Its an addictive and indispensable device (crackberry!) - just one caveat..
The phone volume in crowded places with noise such as say shopping centres etc can be a bit disssapointing with current model. Get the service provider to test it with you in similar enviroment to be sure ure happy. See details on blackberry.com
Enjoy!
R