I am curious about "Math Rock", can you explain?

From wikipedia:

“Math rock is a rhythmically complex, guitar-based style of experimental rock music that emerged in the late 1980s. It is characterized by complex, atypical rhythmic structures (including irregular stopping and starting), angular melodies, and dissonant chords.”

Sounds awesome, though I am apparently a little late for the party… Anywho, I have been a fan of music that gives other people exteme headaches (AKA IDM music) and have been a part of the experimental music “movement” for quite a while now, and I have never heard of this. I play guitar, and have friends that have wanted to start an indie rock band, so my question is, is this kind of music still popular, and how can we get started with it? Thanks!