Today comes a new wave for search engines with the first-ever Beta launch of 'Dynamic URL Rewriting' in Site Explorer. The new feature provides the ability for site owners to alert Yahoo! of the dynamic parameters in URLs that they'd like Yahoo! to ignore, which we'll then automatically rewrite accordingly. Try this out for all the cases where you'd want to use parameters in your URLs that don't affect the content of your page, but that have other important uses.
Well, until today you needed to keep your URLs straight and in order to work on both search giants, now we have diversity. I am not sure, if that is good... shouldn't it be the same on both engines and on both engines clean (no session ids, etc.)? Or do I misunderstand something here? There should not be a need for a SEO'ing webmaster to report re-write rules rather than having those in the server config for ALL crawlers?