Additional tagging features for the main site.

There are a couple of (or three) tagging features that I think would be useful on the main site.

The tag auto-suggest that we have on the forums.
The ability to insert a tag at the cursor location, rather than the front of the comment. Quite often, the author has to respond to multiple commenters, so has to break a comment up into sections. So if we could insert the tag where the cursor is, it just maintains the editing continuity a bit better.
I know this one has been mentioned a few times... but the ability to tag the author when they haven't posted a comment on the mod page. If they haven't commented, it is actually easier to tag someone who isn't the author, which is kinda strange.

None of them are critical in any way, it's just things that make interacting on the main site, similar to how we can interact on the forums.

Although had I noticed something I have only just spotted, it might make some of those easier... After all this time, I have only just noticed that you can resize the comment box.