I don't ride a recumbant bike - but I still get work done on my bikes at bikes@vienna, in lovely downtown Vienna, Virginia. This, even though the store I purchased my bike from will do most maintenance for free . . . . problem is I can't stand the owners attitude there and so, I head over to the friendly folks at bikes@vienna.
If your looking for a recumbant bike, they are clearly the place to hit, or if you need top notch service in Northern Virginia I highly recommend them (they are just off the W&OD trail in Vienna.
Plus, they have a great new blog going, From the Pocket.