Apple on Tuesday introduced new iPhone and iPod Touch models, which come with double the memory and also cost $100 more than the previous models.

The iPhone is now available in a 16-GB version and is priced at $499, while the new iPod Touch model features 32 GB of memory and also is priced at $499. As a comparison, the 8-GB version of the iPhone is $399. The 16-GB version of the iPod touch is priced at $399, and the 8-GB version is $299.

Both devices use Apple's Multi-Touch software and user interface for interacting with music, videos, photos, and the Web on a full touch screen. The new models come with the latest software enhancements, including a major one in the Google Maps application. Introduced in firmware update 1.1.3, the app now offers a GPS-like location and navigation capability.

The iPhone and the iPod Touch also allow users to create Web Clips for their favorite Web sites, personalize the home screen (which until now has been static and unchangeable), and receive movies from Apple's iTunes Movie Rentals.

Apple launched its video rental service on iTunes last month at the Macworld conference, managing to sign up all the major studios, including 20th Century Fox, Warner Bros., Disney, Paramount Pictures, Universal Studios, and Sony Pictures. The service is expected to have more than 1,000 films by the end of this month.

Late last month, AT&T introduced iPhone voice and data plans specifically for business users, who are likely to benefit most from international roaming. But they'll have to shell out an additional $25 a month on top of an existing data plan to get 20 MB of overseas usage or an additional $60 a month for 50 MB.