Hmm, I dunno man.. this is an early build and I don't think the devs would recommend using different kernel regardless, because it makes it harder to track bugs.
If your after a smoother experience cm7 is still probably better at the moment.
This port isn't at the stage of making small tweaks to improve performance, they are bug finding/fixing atm and then I guess they will be concentrating on implementing mainline cm changes. Once cm9 is released I'm sure custom kernels will get released, but I doubt that kind of thing is a priority right now, if you know what I mean..
While this port may be stable enough for some users to use everyday (it is for me anyway) it is by no means a finished product and changes might require you to wipe everything or bugs might crash things etc..
But yes I know ICS is teh awesome! and going back would be sad, but have patience big changes are coming
Send from my GT-I9000 running Teamhacksung's ICS port