- To me the text underneath the name of the person looks a litte strange if "CSP : " is on one line, and the actual points is on the second line. Perhaps you could put the vehicle/character on the top line, and CSP + Date on the second?
That'll all show on one line if your screen is wide enough, although I'm still tidying that bit up.
- For those 4 little buttons under the score, do they replace the clicking on the user's name and clicking on the score itself? They do look handy but it also looks a little crowded.
They do, yep - you can still click on the user's name to go to the history but I thought having icons as well would make it a little more obvious that you had the options.
- Does the rank button in the bottom right show your rank, or will it show N/A for everyone?
It's a live button so it will show your rank - I just happen to be a bit under-submitted on Mario Kart

- That button with 2 arrows next to the words "Top 10" in the dropdown box, what's that for?
If you have JavaScript, the chart will reload when you select a new option in the dropdown (better demonstrated in the video) - if you don't you'll need to click that icon to refresh the form.
- What does the More tab do?
The charts on CS3 have a dropdown list of other charts for this game underneath the chart - they are moving to the "More" tab on 4.
Eep, that looks pretty ad-heavy. Looks neat though...
Those ads aren't final - at launch it'll be Google Adwords at the top, Project Wonderful top right and a rotation on the right. But yes, there's a few more on 4 as I've been able to properly integrate them into the layout. Hopefully 1 million+ impressions a month, per ad(!) will help pay the bills and donations may become unneccessary.