I'm working towards adding ECDH and ECDSA support to gnutls. I've currently ported libtomcrypt to use gmp directly and nettle's types. The code is under development, and can be found at: http://git.savannah.gnu.org/gitweb/?p=gnutls.git;a=tree;f=lib/nettle;h=23d9e...
The ECC functionality is confined to the ecc* files. It would be nice if nettle included it or something similar.
btw. Is there any plan on an 2.2 release?
regards, Nikos