Tags vs Categories

Seems I can have both tag and category clouds in WordPress, sweet! I know that tags can be sprinkled anywhere in posts, but what about categories? I see that categories can be hierarchical which tags cannot do by design.

I get a checkbox list of categories when creating a post. I’m putting this post in every category except “Uncategorized”

I have to enter tags manually, separating them with commas. I sure wish it could give me a list of my currently used tags. Perhaps I just haven’t found the list yet…   Ah, it has a type-ahead in the tag textbox for currently used tags, but you have to know the first letter of the tag. Better than nothing.

Plain text indication of bold, underline, italic, etc.

Use underscore characters at the beginning and end of the _underlined passage_.
Use asterisks at the beginning and at the end of *the passage you want to put in bold face*.
Put a slash character before and after the /italicized passage/.

Examples:
_Underlined_
*Bold*
/Italicized/

Sources:
Underlining in Plain Text Email Messages
Email Netiquette Tips, Tricks and Secrets