The MIUI team have just released some preview screenshots of the next version of the ROM, version 4.0. The new version will be built on top of the new version of Android, Ice Cream Sandwich. A lot of people criticize MIUI for the iPhone-esque look which it brings to the Android platform but it just doesn't bring a new look, the ROM also brings a whole new bunch of apps which out class the stock Android app that you usually get.
The previews show off the contacts app, launcher app, music player, gallery app, settings menu, phone, call log and messaging UI. It all looks great and is very different from the dark ICS look. If you're into black on white, instead of the standard white on black, MIUI could be a great choice for your next ROM.