I mean get bpm in the game, but also get the range in both the song page and in the game.
After all, anything with multiple BPMs ruins the usefulness of this.
http://puu.sh/OD0well something like that would show 25-200 BPM, which shows you it's incredibly varied, and would obviously be mostly useless.
A song which has an unstable bpm/has ritards would be like 188-200.
coupled with the music, you can at least put an average BPM to the song.
for me, I know 240 BPM is absolutely ridiculous, 180 is doable, etc... Though I usually just go off the music.
Its still nice to know the length.