How do you find out what it would look like without downloading it? The website shows no examples.
You can also turn off the screensaver part and it will continue to run as a background application. In fact, if you allow the screensaver to run, it slows down the data crunching considerably (if that is important to you). If you just want a neat screensaver, it can be that too.
You can join a SETI group so your calculations are added to a team total. We have a small group of SETI FReepers:
http://setiathome.berkeley.edu/stats/team/team_15327.html I forget who started the group, but you are welcome to join :-)