So evidently this is an exciting time to be a Superman fan. There's a lot of hype, anyway, from the comics world. DC's really pushing the fact that Straczynski is writing Superman. Action Comics #700 comes out today. So there's lots of stuff on the web about him right now.
Here's a lengthy and interesting post about his costume and origin.
And a sort of retrospective with lots of visuals.
Then there's The Many Tomorrows of Superman.
Here's a description of Absolute All Star Superman, with a lengthy comment by designer Chip Kidd.
That'll do for now.