We currently have SBS 2008 with Exchange.
I think its time to go to a hosted solution.
We currently have 60 mailboxes. I'd project a need for 75 total in the next year and 100 in the next 2 years, but no guarantees there.
Uptime is a big concern. I need seamless integration with outlook and iphone/ipad. Calendars are a big deal in this office.
Spam filtering is also a huge concern, we get a ton of spam.
Pitch me your solution. Or throw me some good experiences you have as a person who uses hosted exchange.