To celebrate, the people of Napster and Roxio are throwing a little party October 29. The House of Blues in Los Angeles is the site.

Ahmet Zappa will emcee the evening, with Ludacris leading the pack of artists expected to perform. Others on the bill include Dashboard Confessional, Interpol, Metric, and DJ Melo-D.

Hundreds of tickets will be given away through local radio stations and fan site giveaways. It’s not yet clear if there will be any available for purchase, though.

“Napster has always been synonymous with music. October 29 is a cause for celebration for music fans everywhere as Napster comes back,” Chris Gorog of Roxio said. “This great concert is a way for us to bring the cutting edge artists of the day to the fans that make it all happen.”

The new and improved – and might we also mention legal – Napster will feature songs available for 99 cents per track or $9.95 per album. And with more than 500,000 tracks to choose from, there’s bound to be something out there for everyone’s musical taste.

With the exception of paying for tracks or albums, the “basic” Napster service is free. There is also a premium service that offers unlimited listening and downloading, 40 commercial-free radio stations, and a whole bunch of other goodies, and it’s available for $9.95 per month.