Yup, it's common cons about full touchscreen phone and I wouldn't recommended to you if you need phone with real keyboard.
For me, I got used with touchscreen on iPhone but I had returned in last year because IM service was terrible at this time and now, they are improved because of beejive, that's alot better than AIM and it does support landscape mode, use on screen keyboard on iPhone is far easier and better than BB Storm, I tried BB Storm at Verizon store and dislike it.
I haven't make decision but just wait and see about what's up with upcoming BB, especially BB Tour.