I recently installed pyblosxom to do blogging, and I use vim to edit my blog posts. pyblosxom automatically transforms your .txt files under a certain path into HTML, RSS, or whatever else is appropriate. Obviously, your .txt files will probably contain HTML, so if you would like to tell vim to use a different syntax highlighting style for files under a directory path, try adding this to your vimrc:

autocmd BufRead,BufNewFile ~/.pyblosxom/data/* set syntax=html

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As an aside, another way to go about this would be a user command that gives you a skeleton entry, saved and named (for instance current time/date stamp) as you desire with your cursor placed where you want. File format, patch mode and other such options can be set as desired as well.