On Monday, accessory manufacturer Belkin introduced several new iPod and iPhone-compatible accessories at the Computer Electronics Show in Las Vegas, Nevada. The new units are as follows:

TuneBase FM and TuneCast Auto: Radio adapters for the iPod and iPhone, these units are equipped with a ClearScan feature to help find the clearest FM frequency available and broadcast on it. Both devices include a line-out port for use with a car stereo input or tape adapter while the TuneBase FM also incorporates a holder mechanism for supported devices. According to Macworld UK, users can expect the TuneBase FM to retail for US$99.95 and to hit the shelves this April. The TuneCast Auto will his next month and retail for US$79.99.

A less conventional but perhaps cooler idea, Belkin's new RockStar hub can connect a combination of MP3 players (including iPods) and headphones. Users can plug their devices into the hub to listen to music held on a friend's playlists and also attach multiple iPods to mix tracks together via a built-in fader attached to the unit. The device features five ports to attach headphones or MP3 players as well as a hard-wired MP3 connection. The unit will retail for US$19.99 and be available later this year.

Stay tuned for more coverage on the new iPod and iPhone accessories at Macworld Expo and let us know what you think over in the comments and forums.