New Blur devices I.E. Bionic, Atrix 2 have a slick screen transition in the homescreen and app drawer and also Miui have some screen transitions that Ive never seen before in any launchers. If there is a "how-to" point me in that direction even though Im not too savvy with stuff like that I'd try to have to some new cool transitions going.
You have for almost every aplication its animation in the apk package. So launcher has its in "Launcher2".apk/res/anim. You can try the same procedure for launchers as its described for frameworks, so take animations from one launcher, put them in the one you are using. I cant say this will work as I have never tried it, but if you are willing to give it a shot please post resaults here
PS: Framework animations are made in general for almost any android device(with any OS version), but as for launcher I think they are made for specific OS/apk file, but as I have said these are only my assumptions
PPS: Make sure you do a nandroid backup in case things go wrong