Christian Sorega wrote on his blog that a new GXR zoom module is expected to be announced tomorrow:
"As a treat for the people joining this meetup Ricoh released some information about the upcoming GXR zoom module. The official announcement will be on Monday so you have to wait till then for all the details but you can get a very good idea what to expect from reading my last London meetup report."
The new zoom module is expected to be 24-80mm f/2.8.