Here's Psycho Toddler about performing with Kesher (they opened for "Country Yossi"), and reflecting on a Yeshivish power trio who are rehearsing "Gelt".
Incidentally, Mark's "Kabbalah" recordings were offically verboten in the Yeshiva High School I attended. Naturally, that's why/how everybody knew about them.
Update: Link was broken. It's fixed now.