What's the most flexible wiki-specific hosting site, for people not wanting to host it themselves? (e.g.., PBWiki etc.)
Some characteristics to think about (I'm sure I've forgotten some):
- Is it ad supported or can you put your own ads?
- Wiki software used (MediaWiki or Proprietary)
- Cost if any
- Ease of editing (do non-technical people feel comfortable with it?)
- Spam prevention features
- Moderation features
- Types of content supported