Hi Peter, the only damp loving herb I could think of would be Mint, and maybe Lemon Balm. But then I had a wee look on the Plants For a Future website and did a search and it came up with about 300+ , heres a link to their search page

http://www.pfaf.org/database/

Hope it helps some, I've found it very handy in deciding what to plant in my windy, peaty, next to the sea garden .
Cheers
CC