After Microsoft's keynote at E3, one of the more anticipated services they announced was Last.fm compatibility. Some of the information of what Xbox LIVE members can expect from the service has been revealed thanks to Joystiq's efforts. The plans can change around by the time the service is released but this is what they're thinking of doing right now:

Silver members get three free hours of use per month with ads.

Free for Gold members, but contains ads.

Premium version will be $3/month with no ads and more personalization features.

Not to mention that you must be having a Last.fm account and a subscription ($3/month) to make use of the service on the 360.

Microsoft announced at their E3 keynote last month that Last.fm would be coming to Xbox Live. We're working on an interview with key players at both Last.fm and Microsoft to bring you more details about the collaboration soon. However, we can share one tidbit: today we spoke with Christina DeRosa, a general manager for XBL, and she let us know who the service will be available to.

"Silver users will be able access what we're considering a trial period of three hours a month, which comes with video advertising. Gold users will have unlimited ad-supported access, so they can use it 24 hours a day. There will also be a premium offering on a subscription basis from Last.fm, that will be commercial free and will also have more sophisticated personalization features, like Loved Tracks."

Last.fm's subscription prices are currently $3.00 US (€3 EU or £3 GBP) per month, so you'll have to shell out an additional $36 a year if you want to avoid the ads and have full access to their service. You'll also need a Last.fm account, in case you haven't set one up already. Luckily, that part is free.