After much searching, I finally found this page to download the Linux PSP package. The latest version on that page is 04.06.00.08. However, during my search, I found a git repo that was up to version 04.06.00.11 (and a few commits beyond). Is .11 simply not released at this time?
Also, how was I supposed to find the PSP to download, with the exception of performing a search of these forums and having a bit of hope? I have an AM335x EVM kit, and of course I'm looking on the pages for this device, but I couldn't find anything!