Great ideas, Sarah. Certainly well thought out-- I can see how all of these could greatly add to the SP experience. I'm for them all.
In order:
1. A new look: Typically, I'm not very fond of appearance updates. Its almost like navigating a new website for me. However, I do think a season/holiday change would be a fun little touch. I've visited a couple of sites that have done this in the past (i.e. create a holiday themed banner or site logo, etc), and its pretty fun. It provides a nice and appropriate little change, while not doing anything too drastic for those who have difficulty adjusting to change.
As long as nothing too drastic is done, a few updated colors here and there is a good idea as well. Perhaps in connection with the season/holiday idea?
2. Clean out the forums: Old threads, big or small, often harbor conversations that were a large part of SP history. I enjoy going back through them from time to time to just read, keep myself familiar with SP history and the people of which have traversed its cybernetic ground, and bring back fond memories (well, mostly fond

).
With that said, I agree deleting old, utterly pointless, and unfruitful threads is a good idea. Dead, duplicate topics just take up precious space.
3. More glory: I like the idea of different trophies. Giving more significance to our members' Brawl accomplishments would be desirably appropriate. Having fun or wacky trophies would a cool touch as well-- I know I would certainly enjoy seeing/hearing of/obtaining one that made me smile, or one that provided me with an interesting little tidbit of brawler news.
4. More freedom: I'm not totally sure what all this "freedom" encompasses. Personalized SP appearance/interaction? I can see how some things would be nice, although it doesn't rank high on my list. Having my own Online Color would be a fun little addition.

I don't think SP could go wrong with granting someone with a few Moderator specific powers, though, such as thread deletion and whatnot (as in the case of the spambot last month).
(5.) Installed spell check: A brilliant idea. This would solve so many "issues", and smarten up SP's image-- not that there's a lot of room to do so.
Personally, I'm a Firefox user, so spellcheck isn't a problem for me. Perhaps SP could be made to only work in Firefox.

(6.) Post recycle bin: Yet another brilliant idea. I've lost several thoroughly thought out posts/threads because of accidental deletion (I have a habit of using my arrow keys to select multiple options in pop up boxes, and pressing them one too many times...).
(7.) Member chatroom kicking: Probably one of my favorite ideas here. I can't count how many times a lack of authoritative SP figures has been a problematic issue in the past.
Wow, the patience you took to create and compose this "essay" is just superb Sarah

I agree with everything on the list. I guess the "kick" thing is a little far-fetched, as only VERY few trustful members can hold this job. A prime example is Bobby, but I don't think he'd want the pressure. However, it does serve as a compliment, then again, how many of us trust Bobby. I know I do.
I'm liking the first idea. Smashpower needs to change its layout every once in a while. It'll make it more appealing.
Thank you for the compliment. Its not a power I'd abuse or take frivolously, to be sure.
I'll refrain from calling out names before this idea gets put into action. However, I do agree with this idea. A trustworthy and responsible person would do well to be gifted with such a position. SP would undoubtedly benefit from such an action-- and give people a better sense of security, if that's the right word.