Scott - I have been running the hybrid SSK 1.2 kitchen cooked ROM with FormerPalm's 2E XIP (OS 21109/build 21109), all day today. I have really been putting it through it's paces, and so far am very happy with it! Everything works great as far as I have seen. Speed is great, and I havent had to soft reset all day. I have more free RAM than I've ever had. Youtube works. Call ignoring works. Notfications work. I havent run into any of the issues people are posting about the 1.5 beta.
I may not even bother flashing again once 1.5 kitchen comes out
Oh and I am still running the rom with the restored backup from SPB backup (originally backed up from the standard SSK 1.2 kitchen made rom). No funkiness.
I'm loving it!