How do I extract month and year to a single cell from a cell that contains dd/mm/yyyy hh:mm:ss?

By way of example:
Cell A2 contains, 4/01/2011 11:25:30 AM

Cell B2 to contain, Jan 2011
(However, it is not to carry over any of the non required data from cell A1.. That is, I don't want day or time)

Outcome is a Pivot Table that tracks order fulfillment - Orders submitted in a month and completions for the month and months that follow.

Mick