Thanks for the effort, this is a fantastic resource.
I installed 5 RSS reader apps in my Linux Mint machine to test the OPML. 4 of them failed to import the file: Thunderbird, Lifera, Quitrss and another one I forgot the name. Gnome RSS did import the file but it became slow and buggy.
I think the file is too long for a typical RSS feed app to process it. Also, there might be some formatting issues a couple apps threw a "incorrect format" error (Thunderbird being one of them). Now trying CPod and giving it time... I hope in 20 mins or so it can work with it. I wonder if web-based RSS readers will work better with the file.