Rather than a grafting of WikiWiki and WebLog tools, it is better seen as a KnowledgeManagement? tool that manages "snips" in a wiki-ish manner. Besides being reader-edited, snips may be commented, have files attached, or be associated with a date. The date association enables creation of blogs.
True to its knowledge management roots, SnipSnap is simple to deploy and fairly approachable to less technical users.
SnipSnap spawned the RaDeox? rendering engine, which implements a WikiSyntax a bit distinct from most wikis.