The original pilot of Curb Your Enthusiasm, which I've seen a few times (sometimes truly forgetting that it's the pilot at all, as its stylistically 75% of the time identical to the show), has its share of laughs. But it is, in its own right, a slightly different animal, so to speak, when compared to its 5-season-and-running TV HBO series. It's meant as a hybrid of what David was tinkering as the main premise of what his show would be about- mainly him getting into awkward bits of circumstance and everyday things with people (mainly with some embarrassing or just strange results)- and his stand-up routines countered with *real* remarks from Seinfeld and others. Despite what it might seem as too much going on in a one hour show, he makes it work well. The improvisational style later nailed to a T in the seasons to come is a little more primitive here, but Cheryl Hinds and Jeff Garlin are pros at what they do here.
There's also a plot line involving David setting up a special on HBO (hence the stand-up), and then at the last moment stopping to due his "dead" step-father. Like all pilots, its got its imperfections, but its perks outweigh the valleys none-the-less. Surprising still at least in having not seen or heard a shred of David's stand-up material before is how it's actually funnier than expected. It almost makes one wonder why there isn't the occasional drop of the real stand-up stuff in the series (but then again, the very Larry David-esquire curve balls on the show are the bits of stand-up theatrical). It's worth it to check out if you're a fan and pass it by one night if by chance on one of the HBO's or on DVD; it might be funnier as well if you know some of the other little back-story bits from the show (i.e. HBO). A minor display of brilliance.