Frames?

That could be replicated without the use of frames. I don’t see how frames would be beneficial there.

Looks like the only thing those frames are good for on that site is masking the URL.

Personally I’m not against frames. Being a designer, I know sometimes it’s nice to have a permanent colored band across the screen purely for the aesthetic value of it. But yeah, before I give in to frames, I’d think a LOT about alternatives. There are other reasons you might want to use frames; sometimes you would prefer to submit data to a server without refreshing the page in which case invisible (0 sized, borderless) frames and some javascript magic can work wonders (user clicks content frame button, data copied to invisible frame, form in invisble frame submitted). There might be frameless alternatives to this, but all I’m saying is frames should be a part of your repertoire. It’s an alternative, and sometimes, it might be the only one or the most convenient one.