Details of Orange's tarriffing for Direct push are now available on their website!

http://www.orange.co.uk/business/corporate/office/accessoffice/mme_details.html

There are a series of different tarriff's available with fair use policy on each of them!

  Microsoft® Standard Microsoft® Extra Microsoft® Max Mobile Modem
usage basic basic + occasional attachment downloads heavy users use your phone for email and as a modem
  Business Plus 200 60 emails a day + 1or 2 attachment downloads per week 200 emails a day + 4 downloads a day all the data for your phone and laptop
data top-up per month £6.50 £12.00 £25.00 £55.00
data only £10 per month, per connection