I suggest using an RSS feed. Either of the following links will work, but the Yahoo Pipes one updates within about an hour, where as Dapper takes a few days.
Copy the code to a text editor (not a word processor), and replace all occurrences of "google.com" with "google.co.uk" or whatever google site you use. After that, paste it back into Stylish and save it. I've tested it on about 10 different countries with no problems, but I don't test very often, so some parts may be messed up.
Because Firefox won't let me use wild cards or regular expression to easily target all top level domains. I would be forced to include probably a 100 lines, which I just don't care to do. There's also a filesize limit on userstyles.org of 64k, so I can't bloat things up too much.
Gmail and Google Reader are planned since I use those quite a bit, but I can't say when they'll be done.
Sorry but that won't be happening. The main reason is because I don't use the personalized google page. I prefer the minimalistic design.
Sorry, but there are no plans to make additional color schemes for any of the styles. Creating more color schemes just increases the amount of work I have to do when updating a style.
You're welcome to modify or use the styles in any way you want. I make these styles for myself, so if you can do something else with them, go right ahead. I only ask that you give me some credit, and maybe email me about it.