Ok...there is Motorola, and HTC, and Palm----and even Apple ...but the reality is----there is no true competition (YET) for RIMM. The blackberry has a solid foundation and they keep coming out with better products.
Like any company that grows, they are going to face more and more issues--and more fierce competition. However, I still think there is plenty of time before this changes dramatically.
Apple support Businesses now....c'mon----the phone's cool (I have it)...but I wouldnt use it for work....