ESS/MSS Approval via Blackberry

Hi,

I'm looking for a solution where we can do an approval from ESS/MSS through Blackberry.

Is it possible if there is a request like this:

- Any approval workflow initiated from ESS/MSS, will be sent to Blackberry, and then there will be a unique number created in email notification as passcode for approval purposes. And the approval process will be done directly from Blackberry back to the ESS/MSS workflow.

Is there anyone who has done this before?

Thanks,

Cassy