Do you have access to your email over the public Internet using one of the following?
POP
IMAP
OWA (outlook web access)
If so, then you can probably integrate your email using BIS.
You won't get wireless calendar or address book sync like you would with Activesync on the iPhone.
I definitely agree!
I am using my bis account with my office exchange server that offers OWA access. I just entered the owa parameters in the bis page and it worked flawlessly.