anthony43 just announced the release of ReGalAndroid, and Android client for Gallery 2 and Gallery 3. Search for “regalandroid” in the Android market, check it out, and file bugs here if you find any. There is also a discussion thread in our forums.
ReGalAndroid currently supports browsing and sharing of items in both Gallery 2 and Gallery 3, and can add new photos only to Gallery 2. Hopefully full Gallery 3 write support is just around the corner!