:: returning from Forums search ::
Are we talking Ajax or fragments? I gather that Ajax is #! ("hashbang") so that leaves fragments. Those won't work in external redirects. The alternative is query strings, but either way you're ending up on the same page. Unless, ugh, you make the query string part of the URL.
Can we backtrack? What's wrong with your existing URLs and why do you want or need to redirect them? When you say "redirect" do you mean redirect (changed URL) or do you really mean "rewrite" (same URL, variable content)?
"Why" questions are best asked in g###-related forums. Apache is for the "how" questions. (The "who" questions go in SSID and the "where" questions go in-- oh, never mind :) )