Yes, photopost does use that type of URL.
It has a "search engine friendly" URL open that will make all the URLs into static looking directory URLs.
See this sample showphoto page from Photopost:
http://gallery.deeperblue.net/showphoto.php/photo/3001
I'm hoping that someone can come up with a mod_rewrite hack for vBa gallery that does this (or something similar).
I do a LOT of search engine marketing, and I can tell you for certain that it does help to have simple URLs like that.
There's a vbulletin hack that does something similar here:
http://www.daniweb.com/tutorials/tutorial12725.html