yes, we submit all software to a bunch of sites (mostly those that accept "pad" files).
a pad file is an xml file used to describe shareware and freeware.
many of these sites exchange pad files so it propagates around.
one interesting thing to look for is whether a site uses the description and screenshot from the pad file or makes their own. some of these sites actually have people that try the programs and write their own summary and picture (for example see downloadsquad above), most just display the pad info.