Yup, Been doing that since soon after Winamp and the Xing MP3 compression app was released in the late 90s! I'm guessing my 6.0.1 Android OS might be having a hard time though.
Nice find! Foobar has been adding them little by little as I've played my MP3s over the years. But that sounds like a great tool for quick mass-downloading all lyrics in your library. I don't see where it's putting them though. I'm guessing in *.lrc text files that seem to be petty much the standard. I was looking at writing them to id3 tags, but searching the mp3tag forums, looks like writing synced lyrics to id3 tags hasn't been worked out yet.