Like others have said don't worry about what it is today. Think of what it will be tomorrow. It isn't like AMD released a 2.2GHz processor as lead off for the Athlon XP, they first released it at 1.33GHz-1.53GHz with the 1800+ and built there way up and it took a long time too. And whenever a new revision of something comes out it usually comes with a lower voltage, like AGP1x started at 5v and AGP2x with 3.3v then AGP4x with 1.5v and then AGP8x .8v. It is the same with SDRAM, it started at something like 3.3v and then we got DDR and got ~2.5v and now DDR-II with 1.8v.
They are also using a new process technology. I know the BH series of ram chips from winbond use 150nm technology and there CH series uses 130nm technology which offered little to nothing over 150nm. So voltages had to go down since it is now 100nm technology SDIIDS(Sudden DDR-II Death Syndrome). So just give it a little time, plus AMD is not going to DDR-II until 2005 so you would not have to worry about til then, like Sentential said.