Street Fighter III's Ibuki, Dudley and Makoto joined the cast of Super Street Fighter IV last week. You can see videos of the Ultra Combos for all three at the Super SFIV official site.

Here's some of the official media Capcom has released to the press for Ibuki:

Ultra Combo 1: Yoroi Doushi (鎧通し)

A throw type Ultra Combo. Ibuki's thrusts her palm, surrounded by energy, at her foe. She does an elbow attack, then blasts her foe with more energy.

[video]

Ultra Combo 2: Hashinshou (破心衝)

A series of attacks sends Ibuki's foe flying into the air. She follows, sending down a shower of shurikens, then slams her opponent to the ground.

[video]

Other Moves and Super Combo