Apple's new iPod lineup is helping to generate additional revenues through sales of QuickTime Pro and AppleCare extended warranties, according to the company's online store.

$29.99 QuickTime Pro licenses for Mac OS X and Windows were the third and fourth most popular items on the Apple online store "Top Sellers" list on Monday afternoon.

Sales of the professional media software upgrades trailed only the iPod video and iPod nano players themselves, which were listed as the two most popular products, respectively.

The latest version of QuickTime Pro (7.0.3) includes a specialized video export function that allows users to save their video content to be played on the new fifth-generation video iPod's 2.5-inch LCD screen.

Earlier on Monday, Apple announced that it had sold over 1 million videos from its iTunes Music Store at $1.99 a piece. The videos are also designed to be played on the new video iPods.

Meanwhile, concerns over iPod nano and iPod video durability appear to be fueling sales of the company's AppleCare extended warranties, which were listed as the fifth most popular item.

Five other iPod-related products — including iTunes music cards and nano accessories — rounded out the top ten. The iPod shuffle was the ninth most popular product, while the most popular Macintosh hardware product was the PowerBook G4 at number sixteen.

According to regulatory filings, sales of Apple software and extended warranties have grown steadily over the past two years. From fiscal year 2003 to 2004, the company's "Software & Other" sales grew 24%, while in fiscal year 2005 the same segment grew 38%.