For many companies the BES server is one of those technologies were you keep your fingers crossed that nothing ever goes wrong because when it does all hell can break loose - the support from the network provider, Vodafone, is extremely poor and we have had numerous outages over the past year or so despite investing huge amounts of cash into new infrastructure and software upgrades.
Management is only has good as your team. We have a large BB user base (over 25,000) and like everything it has its hiccups but its pretty solid. The iPhones are solid also. You can thank Activesync for that.
"BlackBerry 6 also offers a new "Social Messages" application that aims to integrate instant messaging, Twitter, Facebook and other social tools across services."
And other important business applications.....
Social Networking is huge these days in business. Especially the business I am in. Twitter and Facebook integration are big big big. Most of our BB users who switched from BB to iPhone did so because of the Twitter/FB integration.