[plt-scheme] keywords (a backward-incompatible change)

I just thought of one small point worth considering in the 
suffix-vs-prefix decision. With suffix-keywords, what would happen to 
the common pattern of writing

     (require (prefix foo: "foo.ss"))

? Would foo: get parsed as a keyword and then cause the require+prefix 
form to fail to match? Or would this just be special-cased to recognize 
keywords too and convert them to the (partial) identifiers they're 
intended to be?

Probably not the biggest issue, but there you are.

Dave