FreeWiki

As WikiGoesMainstream, plenty of free-wiki hosting sites are springing up.

• http://wikispaces.org/

• http://pbwiki.com/

• JotSpot does I think

• http://www.schtuff.com/

• http://www.xwiki.com/xwiki/bin/view/Main/WebHome?language=en

Do these?

• WikiCities ?

• TaoRiver ?

Questions : what's the business model here? Allow people to set-up wikis and upsell "advanced" accounts? Sell ads?