Alright I've owned an iphone 3g, a blackberry torch, and now a Sony Xperia. And I can say definitely in conclusion blackberry hands down has the best messaging system, followed closely by iphone and Android is catching up quickly... BlackBerry's recourse is to sell the blackberry software on the android platform and license their keyboard patents to competitors at the same time continuing to manufacture their products, but instead focus on end to end security* for government and big business contracts. Recluding from the civilian market and putting blackberries in the hands of policemen and soldiers, given time, will allow the blackberry phones to again become fashionable. BlackBerry then can control a release back to public demand.
*end to end security - blackberry would have the opportunity to make a completely anonymous phone here. This would be a great patent to have once anonymity becomes more valuable to consumers