Forum Moderators: Robert Charlton & goodroi
Google Says Don't Rewrite Dynamic URLs
[webmasterworld.com...]
Related to your question, from the Google Blog article (with Google's emphasis in black italics, and my emphasis in red)...
...There is no limit on the number of parameters, but a good rule of thumb would be to keep your URLs short (this applies to all URLs, whether static or dynamic). You may be able to remove some parameters which aren't essential for Googlebot and offer your users a nice looking dynamic URL. If you are not able to figure out which parameters to remove, we'd advise you to serve us all the parameters in your dynamic URL and our system will figure out which ones do not matter....