Rdio, the all-you-can-eat music streaming service that we've previously showed you in screenshots, no longer requires an invite, or even a credit card, to try out for three days free. After that, it's $5 per month for desktop and browser access, and $10 per month for streaming and offline access on iPhones, Android, and BlackBerry. If you've given Rdio a try, tell us what you like, and whether it might be worth the monthly outlay, in the comments. [Rdio via GigaOM]