Loads of posts about this in various threads.
General consensus seems to be that we'd all like to be able to hover the cursor over the flag and have a little yellow text box appear with the country name. Don't know what the technical term for that is.
Also don't know if Russ etc have any plans to do this - probably not top of their list of priorities, I imagine, given that we're just being lazy in disliking having to go to the Flag Index.
chessworld.net has exactly this feature, by the way. Not that the site as a whole is remotely as good as TFC/RHP of course.