After doing about 5 minutes of searching (if that), I found a Google cached version of a dasBlog documentation page (the actual page couldn’t be found, WTF?)

Snip:
The subject is prefixed with the prefix that has been set in the configuration. Categories for the entry can be set by including the category names into the subject line using square brackets. There may be multiple category entries on the subject line. The entry title becomes what remains of the subject line once the prefix and the category items have been stripped out.

http://tinyurl.com/a2x8a

So, I’m adding this post via email to both the “General” & “Did you know” categories.

This feature is SWEET in my opinion!

UPDATE: Ok, multiple categories failed, will do a bit more research.