Gyūki

The Eight-Tailed Beast is currently one of the two remaining Tailed Beasts that was not extracted by Akatsuki, while the other one being the Nine-Tailed Demon Fox. Due to Akatsuki's depleted numbers, Madara Uchiha ordered Team Hawk to capture the Eight-Tailed Beast. The host appears in chapter 408 of the naruto manga, released on 7/10/08.He seems to come from the hidden cloud village. [from http://www.onemanga.com (c)] Artist Nin XP 03:18, 11 July 2008 (UTC)
 * Name:
 * Creature Type: Unknown
 * Host: Unknown
 * Unique Traits: Unknown
 * Status: Active

Speculation
this jinchuurichi could be the one that Yugito Nii(the nibi jinchuuriki)was talking about being the strongest shinobi in the village.As most of the other Tailed Beasts are based upon mythological creatures, it is speculated that the Eight-Tailed Beast is based upon the eight-headed and eight-tailed dragon, Yamata no Orochi.