David Letterman, the CBS host who has competed with Jay Leno every weeknight for 15 years, now feels empathy for his late-night challenger.

With the Oct. 30 issue, which will go on sale Oct. 17, Rolling Stone, published by Wenner Media, will adopt the standard size used by all but a few magazines.

An explosion of Western magazines has hit newsstands in India in the past year, pitching a familiar mix of gossip, relationship advice and expensive goodies.

The magazines Rolling Stone and Men’s Health are testing programs in which readers can take cameraphone pictures of icons on ads to receive more information or an offer from the advertiser.