Or save yourself a hundred bucks and get an ad-free DS?

ENGADGET: Gizmondo bringing Smart Adds to the US

Also like the main Android version, there's a so-called CD Listening Party feature that opens up free, complete albums, with selections changing weekly. (Naturally, you can also use the app to listen to your own MP3s stored locally on the device, but you probably gathered that.) Play will be available as a free, ad-supported app, though you can also get an advert-free version for 99 cents.

ENGADGET: AOL redesigns its Play music player app for the Kindle Fire, premium version is free Thursday

Efficient claims its ad-placement algorithms get 20%-to-50% better results than companies do on their own.

FORBES: The Keyword Keeper

That supposition needs to get tossed with ad rates on a one-way trip to the basement.

FORBES: Banner Year? Not Quite

That has helped it get all its property and motoring ad revenue back - and it is now 25% of its revenue.

BBC: Paper Tigers

The free version will be ad-free for the first 60 days so fans can get a taste of the service without any distractions.

ENGADGET: MOG FreePlay brings 11 million songs to the web gratis, makes you work for free tunes

We call these ad-hoc contests games, and one of the ways games get turned into sports is standardization.

NEWYORKER: Glory Days

Why did so-and-so get such a great book cover and mine looks like an ad for the circus?

FORBES: Why Jealousy Is Good For You

It includes a calculator for determining how much revenue, value per click, and return on investment marketers get from various kinds of mobile ad actions, such as clicks to call a business or even in-store visits.

FORBES: What's A Mobile Ad Worth? Google Would Love To Show You