All of your questions are answered by our API Terms of Service. The tl;dr;
you can display your own ads, but you may not interfere with ours, given
what that you're using our flash API that means you may not prevent our ads
from loading. You can use our logo but you cannot purport to be us. We show
a watermark on the stream so that may be enough for you.
I'm trying to summarize the ToS here, they are the final say though and we
reserve the right to change them in the future.