In addition to the nano, Apple also introduced a single iPod classic model and changes to the iPod touch.

The new iPod nano, as seen at Tuesday's live event.

The new iPod nano, introduced by Apple CEO Steve Jobs during a press briefing in San Francisco Tuesday, is touted as the thinnest iPod ever built and features a taller form factor with a larger screen than the previous nano.

Jobs touted the newly redesigned iPod nano as more environmentally friendly than past models, using arsenic-free glass, free of BFRs, mercury and PVC, and made of more recyclable materials. Theres more were going to do in the future, but these are the cleanest, toxic-free iPods weve ever built, he said.

The revamped nano line comes in a host of colors—purple, blue, green, yellow, orange, red, pink, and silver. The 8GB nano sells for $149 while the 16GB model sells for $199; both nanos are now shipping.

Apple also pared down the iPod classic line to just one model—a 120GB music player that costs $249. Previously, the classic line came in two versions—a $249 80GB model and a $349 160GB model.

The remodeled iPod touch adds integrated volume controls, a built-in speaker, and the same tapered back as the iPhone 3G. The 8GB touch costs $229, while the 16GB and 32GB models cost $299 and $399, respectively. All three iPod touch models are now shipping.

Macworld will have more details on the changes to the iPod line as they become available.