Phade:
I agree witht he bandwidth cap. I don't agree with the queue. Queues are HORRIBLE. They not only make me not want to donate, but they make me want to leave the site and never come back again. If you make it a high download cap (like 80kbps or something), then it wouldn't be so bad to complain about, since your rates are already so high(I get up to 2mb per second, sometimes).
And just to emphasize others' ideas, custom titles for donators = GOLD.
I'd pay a lot more than I usually do for a custom title. I honestly don't know why random people got custom titles in the first place(I know it stemmed from the OT junkie thing, but I must've missed the dedicated thread.

Pictures in vid info/journals: Somehow allow all HTML and/or BBCode in journals and video info. I'd pay a buttload to get that. You don't even have to host the pictures people are uploading: tell them to direct link to something like imageshack.us or photobucket.
Personal banners and paying for them: No go. Just. Ew. No.
OT Forum for donators: GOD YES. I miss the OT forums SO BADLY. I'd seriously pay $50 to get that back.
My own idea:
Faster regression donation priveledges. The only reason I've donated in the past was to help out the site (I didn't care about the donate ads or anything). But after my priveledges started to wane away, I've wanted to donate again. Before, you said that the priveledges would never go away, so I figured I'd never donate or again unless I had some insane surplus of money.
But I think I lost all my priveledges aside from the search now, after two years. And it's getting to me. So I think if you made everything go away after one year, people would donate more. Perhaps an auto-email/pm warning people their status will go down once the year is in December or something would be a good idea, also.
On a sidenote, Phade, Personally, I think you should've never done the local video thing. Most of the older, nicer regs here knew this insane leeching would happen, and I really do think we're better off without a local system alltogether.
SuperFusion: Currently, it is impossible to code donators being allowed to edit their posts anywhere. That doesn't really work with phpbb, and if it does, I really doubt Derobert/Kalium can handle modding and upkeeping it in such a way.
[MOD22: I've split OT comments from this thread. Please keep it to the topic.]