The Dahak trilogy can be found as a single compendium entitled
Empire from the Ashes. I quite enjoyed those books as well, and he certainly left a lot to be done at the end, though I don't now if he has any intention of continuing in that universe. Seems kinda unlikely though.
There's also the 'March' series (March Upcountry, March to the Sea, March to the Stars), which is different again, but quite enjoyable.
Any new book by Weber is something to look forward to, in my humble opinion
