MacWorld Australia is reporting that the MacBook Pro lineup will be updated on Tuesday, April 13th.
Their source "is familiar with Apple product cycles and inventory levels."
The source said that an update to every MacBook Pro model was expected on Tuesday, 13 April, but was unsure about the MacBook Air. The source was also unsure of any further information regarding a local date for the iPad release, but agrees that 24 April is likely.
Rumors of a MacBook refresh have been circulating for quite some time. Mainly because its been so long since the notebook has received an update.
Apple is expected to upgrade to the new Intel Arrandale mobile processors which are now shipping in volume.
Steve Jobs has indicated that the updates are imminent.