<- what do these mean?

[mooxim]

I figured out what the symbol to the left of the thread title is. It's the message icon which you can choose between attachments and tags.

But what do the icons with the folders mean?

I'm gessing the ones with red thumbtacks are important ones which stay at the top of each page.

Firey ones are ones with a lot of attention (hot topics)
Exclamation marked ones are official projects.

Locked ones wont recieve any more posts.

New ones signify forums with new threads.

and ones witha globe and 3 links of a chain are links to other sites (pogopedia)

Is this right and are there any others?

[chelseeyuh]

The exclamation points also means they're getting a lot of attention, just not as much as the firey ones.. Exclamation marks turn into firey threads once there are some more posts.
But other than that, you got them all right!