Cyptic have announed on thier website a new Klingon Vessel, to go with the earlier announcement of the NX-91001, The Raptor Class. a vessel like the Defiant, small, powerful, but ill equpied for a medical emergency.
The post also hints that there will plenty more ships to come "After the Dominion War, the Klingon Empire embarked on an aggressive period of starship design and construction to replace ships lost during the war and subsequent conflicts."