Nice article from Mike Caulfield on blogs, wikis, and whether we could/should try to merge them into one thing.
Wiki and blogs have two different cultures, two different idioms, two different sets of values.
Interestingly, Mike thinks they should be kept distinct. However, it does feel like his analysis of wikis is not thinking of them as personal wikis. Some of the values Mike mentions for wikis (like minimization of personal voice) maybe applied to the original wiki concept, but do not apply to personal wikis.