I was thinking of this program, which is distributed that way. http://www.calculatem.com/ There are a lot of casual users who would definitely be interested in something to give them an edge, but I guess the problem is they don't know such programs exist.

And sure, most people probably already have accounts at their preferred sites, but it doesn't hurt to have it as an option. It's easy enough to open a new poker account (well, it was when I was playing before Bush messed things up) and getting the typical bonus + software could be enough to play for a week at a second tier site.