I am about to get a Vodafone UK BIS £10 a month Blackberry

Question is

1. I have a POP3 email account
2. I use Entourage 2004

Ideally I would like to sync mail AND calendars.

Is there a hosted Exchange and BES service which does this with a BIS subscription?

What are my alternatives - I don't see the point of moving to hosted exchange if I can't sync calendars (standard email forwarding or polling would do the job if that's all I was permitted to do)

Any suggestions?