The new drivers work... for the most part. I still have a rather aggravating OSS under ALSA issue; cat (wav) > /dev/dsp results in pretty loud screeching instead of the right sound. I hope my tweeter isn't blown. 5.1 sound doesn't work, and dmix results in a bad hiss. Not that there's a reason to use dmix, but it shouldn't be hissing either. There's also been no approval activity on the Creative bugreport page for over a month, but if you look at the RSS feeds, bug reports are still being made.
My modded Elite Pro sounds much better than the Prodigy 7.1 HiFi I had in this box, but I might go back to it because of the killer OSS issue (vmware sound doesn't work).
I haven't seen any emu20k1 code in the alsa repositories, so I'm wondering if it might even be in 1.0.18.