After discovering the admin themes, I think it'd be cool to be able to easily switch between them.
Tiger is cool enough to be a plugin so you don't have to replace any files, but it shows up in the plugins list of course, mixed in.
I'm thinking like either a style picker (exactly like the Presentation page and the templates folder), except for the admin panel.
And while I'm at it, it'd be cool to have it as a per-user setting. Hell, I bet all of this could even be a plugin to add these options.
Anyone wanna take this on, or take this on with me? I don't have enough experience to do this alone, but I'd be willing to help if someone doesn't want to do this on their own.