An update for this post:
The Jewelcrafting Quick Reference Table has been updated to include the various new jewelcrafting patterns being implemented in patch 2.4.
This table includes all jewelcrafting gem cuts excluding BoP gems that are JC-only. It is current as of 5 March 08, Patch 2.4 PTR build.
If you prefer it in PDF form, you can download a copy here: jc24b.pdf.
Updated 5 March 08 with epic versions of the new blue gems.