I've been hoping someone would build something like Ultralight for a long time, and am excited to play with it.
I'm guessing that the current best answer to this is to experiment and use the framework most familiar to you with Ultralight, but I thought I'd ask anyway. I'm not sure if there are certain elements of the renderer and components that might favour one framework over another.
Further, are there any Ultralight development patterns which have emerged from early development to get optimum performance? I'm assuming a few developers might have had the opportunity to test the platform with larger code bases ahead of the 0.9 release.