An infinite combo loop for Abel has been discovered in Street Fighter 4.

This works against Chun Li and Rufus and may work against other characters. Here's how it's done in the video.

Against Chun Li: Standing Light Punch, Link into Crouching Light Punch, Link into Standing Light Punch 2x, Link into Towards + Medium Kick, Cancel with Dash, start over.

Against Rufus: Standing Light Punch, Link into Crouching Light Kick, Link into Crouching Light Punch, Link into Standing Light Punch, Link into Towards + Medium Kick, Cancel with Dash, start over.

Also Fei Long has an infinite combo that only works against Abel and Seth, which you can check out here.

As is the case with most of these loops, they're VERY difficult to do over and over again and after awhile they start taking off almost no damage.

Thanks goes out to Noodleman for pointing this out.