While I can't comment on what technologies eweek and gamespot use, you need to remember that URL != filename (although it normally does). If your stuck in that metaphor, you may be able to use commas in your filenames - it all depends on what OS/filesystem you're using. With apache, you can use modules like mod_rewrite (lighweight) or mod_perl (heavyweight in that you're able to do more that just URL manips) to obscure your URLs. You can also play games with PATH_INFO.

As for the usefulness of these types of URLs, check-out Jakob Nielsen's take on URL as UI - to sum up, it's not good.

-derby