Disclaimer: We are the authors of Sahi, and this answers the original post and the next answer by Tarken. This is of course biased, but I hope in a sense of fairness this will not be removed :)
Hi Steve Miskiewicz, you should definitely check out Sahi. Don't be worried about the blogs and online presence. The problem space of web automation is small. You find elements and perform actions on them. And make sure that it works on all browsers. Sahi guarantees that.
If your application uses extjs, zkoss, gwt or other such rich UIs, you will find Sahi to be very useful.
Screen shots have always been possible with a simple Sahi function. Screen shots are not what Sahi Pro charges for. Even open source Sahi can execute multiple scripts on say 5 instances of IE in parallel. If a screen shot is taken, the wrong window may be in focus. It is a choice to either focus on screenshots or run 5 parallel instances on a single machine without getting into multiple VMs, grid etc. Even here, Sahi Pro does have native focus and screen shots in the latest release. (And Sahi Pro has distributed playback too)
Sai Pro charges for innovation, accountability and sustainability. Most organizations value these, and that is why Sahi Pro has a fast growing customer list.
If you want testimonials of the open source version, you may see some here: http://books.zkoss.org/wiki/Small_Talks/2010/January/Making_ZK_Functional_Tests_With_Sahi
and here: http://sahi.co.in/forums/viewtopic.php?id=2582
On a different note, on posts like http://stackoverflow.com/questions/606550/watir-vs-selenium-vs-sahi, posts in favour of Sahi have been (incorrectly) questioned for integrity. I believe it does not encourage Sahi's supporters to speak in public. I hope this post does not go the same way.