How important are the following features?
- RSS feeds for Blog and/or comments
- Technorati pings
- Blog or topic categories
- Post story to: del.icio.us | Digg | Newsvine | NowPublic | reddit | StumbleUpon | etc...
- Captcha to prevent Spam as opposed to moderating unpublished comments
- Tags or Keywords
Assume that whatever is selected will allow searching and custom titles. I know that some of these components/modules may not allow customizing the meta description.