Yes, it is too good a title to pass up... however. First go have a peek at what
Ross Mayfield had to say about a small jab that Jot took at his company, Socialtext.
I'll confess to be a bit puzzled by Jot as well... go search for "ProjectForum" on Google and you'll see a Jot ad. Frankly, I don't think anyone in this space is big enough that cherry-picking will yield much in the way of results, nor provide the satisfaction of besting a mighty foe. That, and I've always thought of them as trying to do a sort of Hypercard-database-meets-wiki thing, which I can see being valuable, but is not really what would turn the crank of 90% of our audience.
I'll sometimes mention competitors here... but let's be honest, I think Ross and the Socialtext guys are doing some good work, and I'm not afraid to say it. They've got a solid application, have helped build awareness about wikis in the market, have generated some decent and well-deserved buzz, and seem like a decent, smart bunch of people. I know the work it takes to appliance-ize and scale an ASP application (we did that with the TeamWave technology a few years back).
Is Socialtext the market leader? I would tend to think so, though CourseForum and ProjectForum have a larger number of customers (we have a broader range of price points though, so while some sales are for more bucks than some of the Socialtext offerings, many are for less). But does it really matter?
There's a lot of room for different solutions right now, and I agree with Ross that the important thing is expanding the market, or in more meaningful terms, bringing this type of technology to real people to help them communicate and interact in new and better ways than they could before. There's ample room for everyone.
Frankly, if there's one thing I've learned doing collaborative software, it's that the software needs to get out of the way of people communicating, and everyone communicates differently. Now if that's not a predictor for having many different solutions, what is?