"The Application "RSS Player" was not installed on the iPhone because of an unknown error occurred (0xE8008001)" This is the error that we are getting after trying to install, and we are aware of it. It may be caused by an unsigned certificate. Emails have been sent to Apple in order to resolve this. RSSPlayer 2.0 is truely awesome, we ask for your patience as we correct this issue. Keep an eye on @iphonepodcaster on Twitter, as updates will be posted.