Folks ask this once in a while on the Business of Software boards: exactly how important are download sites to a uISV’s promotion strategy? 

Confirmed Installs By Download Location in March 2008:

 Download Sites Are Useless

Any questions?

(OK, it isn’t quite that cut and dried.  I’d still recommend doing submission via Robosoft for the SEO benefits of the backlinks it will get, particularly for a new uISV.  However, in terms of driving downloads, download sites are all but worthless.  It is easy to figure out why if you watch users looking for software: rather than going to and searching for it, they just Google it to start out with.)