Yes but are they worth it? will they handle games 1 year from now? i was thinking of the 4850x2 but i have heard mix reviews and do not know about it.
4850x2 runs pretty fantastic, I just picked one up myself on newegg when they had a rebate. Most people have little issue with them now that ATI officially supports them in their drivers.
You can almost promise it will handle anything a year from now unless the next Crysis-like engine comes out between now and then.