A comment from Adam V. on why complicated stuff like Share Point is productized, but something as simply beautiful as a Wiki is not as easily productized.
In response I think this is a two-sided coin, with a customer as well as a vendor.
I think there is something to the "monetizing" argument.
I think it also comes from the customer side... I continue to see a lot of behavior in large enterprises that seems to believe anything of *value* (not just cost, mind you) should by definition be big, complicated, and even cumbersome.
Really. I think the portal vendors, like other kinds of vendors, are just capitalizing on these behaviors. "Selling" something as simple as a Wiki, or even as simple as Smalltalk, is *more* difficult than selling the more complicated and costly approximations.