American Express is now debuting the latest installment of its Seinfeld-Superman commercials, on the web.

(It can be found here, in the reel "Hindsight.")

Like Seinfeld's TV show, the material is very close to the comic's standup act - and very funny. So far, no other major corporation has chosen to debut long-playing commercials over the web - but it looks like it's got potential. After the commerical ends, viewers are given a prompt to apply for an AmEx card if they want one.

Unlike T.V., the Web commercials can get an immediate response from viewers. And without AmEx paying Super Bowl rates.