Let's bump this thread once again and hope it will get a little more discussion - especially now that David Williams and Eric Froelich both played Hatebears in VSL the last weeks and did well (although I'm not really a fan of the build they played but I can comment on that another time if desired).
Personally I'm a big fan of Palace Jailer but only in certain builds. It has been very good in the one I posted originally in this thread (because of Ancient Tomb, Containment Priest and Eldrazi Displacer), but I do recognize that it can be clunky in more traditional builds.
I have been playing both Mono White, GWB and GW lately, and personally I prefer the Mono White or the GW builds. Black gives acces to some very good cards like Dark Confidant and, especially, Abrupt Decay and Demonic Consultation but I don't like either Dark Confidant or Abrupt Decay against Shops and what I've found is that you really want to focus on Shops first and foremost for at least three reasons. I've also found both Deathrite Shaman and Kambal, Consul of Allocation to be underwhelming. Basically Deathrite Shaman is too slow and I almost always wanted it to be an Elvish Spirit Guide instead. Kambal is also slow and I'd rather prevent my opponent from playing spells instead of him taking 2 damage off each spell.