Recently I needed to access Memcached from Go. I couldn't find a suitable package anywhere on the web, so I created one. Gomemcache provides basic operations to store, retrieve and delete data using memcache text protocol. You can download the package from its Github repository.
Edit: Gomemcache is now distributed under the terms of LGPL license with static linking exception. It means that you can link it statically with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you meet the terms and conditions of LGPL for the package itself. Originally GNU Lesser General Public License does not allow unproblematic static linking with proprietary source code.