No, it will not effect your mobile office suite at all.

I just performed the full updated as stated on the website and didn't have any problems at all! The phone even booted up into Windows Mobile 6.1! The sad thing to me is that I really don't notice any differences... What happened to the cool new Today Screen that has been advertised everywhere? I do now have Threaded Messaging which is very cool, but is this the only real new advantage to WM 6.1 besides GP?