Blackberry push-mail costs

Blackberry push-mail cost can sum-up to big bucks for international travellers. Add to that, the voice roaming costs, and of course do not forget the additional service charges of the local provider for each international roaming bill record,… Here we go again, was it the budget and finance colleague who has just called in? It is no wonder why everybody is in the wireless communication business. Any ideas on how to keep the costs low? Any recourse for us, the users?