THE HEKHALOT RABBATI, the longest Merkavah mystical text, is now available online here in the hitherto unpublished translation by Morton Smith, revised by Gershom Scholem. I haven't had a chance to read the whole thing yet, but the bits I've seen in the past paraphrased pretty freely. Rebecca Lesses alerted me to the site some months ago, but I was very busy at the time and never got around to looking at it. Michael Miller of Ayin's Razor reminded me of it today.

I'm working on a translation of the Hekhalot/Merkavah corpus myself and I've posted part of my own translation of the Hekhalot Rabbati in the handout that goes with my November 2008 SBL paper here.