All new routes are now on sale via online travel agents (but not on flybe.com).
All fares (for the moment anyway) to/from LCY, SOU, IOM, BHD and DUB are £80.95 each way (even the DUB-MME leg which doesn't attract APD) although some of the return flights are a few pennies cheaper. Most flights to CWL are now also £80.95 as are the Tue-Fri ABZ flights (Sun & Mon are a lot more expensive). You can also book connections onto FlyBe's network which will open up a lot of new destinations.
I booked the inaugural MME-LCY on 27 April.