Some WikiEngines allow you to edit pages the standard way or append comments in a forum-like way. They are somewhere between "vanilla" wikis and a WikiLikeThing.
Advantages:
- Pages can be locked for edit but still open to comment (AppendOnly).
- UserNames and datestamps are displayed next to comments.
- Users used to forums don't feel lost and get used to the WikiWay gradually.
Disadvantages:
- Encourages ThreadMode.
- ameliorated by WikiMasters subsequently folding comments into the main text where appropriate.
- DatestampsConsideredHarmful.
- ditto
Known examples:
- QuickiWiki/ClusterWiki
- ProjectForum
- OddMuse can be extended to support this feature, as CommunityWiki has done.
- MassMind is a WikiLikeThing that supports comment appending.
- WaGn (AppendOnly or not)
- WeRc (http://werc.cat-v.org) implements comments and wiki editing as orthogonal and complementary features, ie., AppendOnly is optional.
See also: ParagraphWiki