Well, well, what do we have here? A T-Mobile G1 with the new HTC Sense UI. HTC Hero is currently the only HTC device featuring the impressive new UI and even though HTC will reportedly offer it to their other handsets, all T-Mobile Android phones won't be on that list at all. However, some Italians managed to run a ported version of the UI called SuperHERO on a T-Mobile G1/HTC Dream.
If you want to give it a go, you'll need to flash your T-Mobile G1 with the SuperHERO ROM (see the source at the end of the article). The software includes a part of the real Hero's firmware. Along with the sexy looking user interface you'll also have multi-touch support enabled much like on the Hero.