"Dota 6.71b 6v6 finally released. It's been a while since we got another DotA 6v6 map (DotA 6.68c 6v6). And now here you go, FuBaSh has made another map. Now you can play DotA 6.71b with one additional player on each side. Check out the links below for the download links."
DotA_v6.71b_6v6.w3x via GameWebz
DotA_v6.71b_6v6.w3x via 6v6DotA
Sources : http://www.dota-blog.com/2011/01/dota-671b-6v6-map-download-dota.html
(p/s: now we need to find another member to be recruit.... no more adventure since all three lane in the map be covered by 2 player each.. LOL)