Any solutions for a team (multiple people) to have visibility into a single calendar for scheduling needs?

Primarily non-BlackBerryhandsets but BB's will be deployed 4th qtr.

also, using Web supported Outlook mail.

I do this all the time, though not wirelessly between multiple. In general, yes you can share a calendar between multiple devices via direct synch.

How do you do this RL? My associate and I use a 7290 and a 7100g with BES through Mailstreet. We want to share an office calendar which would keep each of us aware of each other's scheduled activities, without having to go through the internet to view each other's separate calendars. However, I've been told by Mailstreet that BBs do not support the use of a single calender by multiple devices. (While saying that Treo's do). Doesn't sound right to me, but I haven't been able to figure it out. Any help would be appreciated.