No longer developed, or developed by the developer. It's open sourced now, though, and here's instructions on building the app from the source code (not that hard). If you're os 10.4, there's even a direct download on this page to the built apps
http://www.iskysoft.com/article/how-to-build-isquint-and-visualhub.html#121
VisualHub
Convert batches of video files into iPod, PSP, DVD, DV, AVI, MP4, WMV, MPEG, and Flash.
Version: 1.34a