Ideas: wiki, bookmarks, blog, and life stream all merged into one.

Post types

"Heavy" normal blog articles.

Bookmarks/links, ala Delicious. Should be able to pull a thumbnail when posting (like Facebook), and cross post onto other sites.

Photos, the minimum of which would just be posting a link to Flickr and automatically pulling photo, title, and description.

Videos. Post a YouTube or Vimeo ID and automatically do an embed, or upload my own video and display with local HTML5 player.

Maps. Post a link to an address, OpenStreetMap feature, or lat/long coords.

Topics/Tags

Should be WikiWikiWeb-style pages that automatically update themselves as new posts are added.

Should be able to create arbitrary topic pages that display combined tags, i.e. have a page for "Linux Software" that pulls from the "Linux" and "Software" tag/topics.

Commenting

Done via Pingbacks, Trackbacks, (i.e. people go write their own blog post), and OStatus (not exactly sure how that'd work… piggy back on Pingback or Trackback?).