The Pignose Hog-20 is a great little amp. Surprisingly good. Amazingly good. Read this review of it by Steve "Big Daddy Bluzharp" Harvell at http://members.tripod.com/~bluzharp/hog20.html
The only thing missing in this amp is reverb. Any suggestions on an inexpensive reverb pedal that won't suck the tone out of a harp mic/amp?
I bought a Danelectro Corned Beef Reverb pedal. For the price ($30) it is pretty nice.