Successful site uses frames, good SEO

[Volitics]

Hello,

There's a newswire service called PRNewswire. Their web site uses frames on the front.
http://www.prnewswire.com

If you do a search on the Google (using phrase: "newswire service") their site comes up second from the top.

If you look at the source code they have a link for search engines underneath one of the frames.

Does anybody know if the way PRNewswire is doing it is a good way for SEO?

[CrabbyX]

If it's necessary to use frames, then this is an effective method of making the frames SEO-friendly, however, single-document pages currently are still better overall.