For the second straight day, shares of PortalPlayer ( PLAY) zoomed upward on Tuesday amid bullish reports on the chipmaker. PortalPlayer stands to benefit from the inclusion of its chips in new and upcoming products from Apple ( AAPL), according to notes issued by analysts with Thomas Weisel and Jeffries on Monday. Following those reports, Jim Cramer, co-founder and director of TheStreet.com ( TSCM), touted PortalPlayer's stock on his "Mad Money" television show Monday night. On the heels of those reports, PortalPlayer's stock was up $2.17, or 7.5%, in recent trading to $31.17. It closed regular trading on Monday up $1.57, or 5.7%, to $29. PortalPlayer's chips are at the heart of Apple's iPod music players. Indeed, about 90% of the company's sales come from two contract manufacturers who build the iPods. Apple's ( AAPL) latest iPod , the nano, is selling briskly, which is a good sign for PortalPlayer, noted Jason Pflaum, an analyst with Thomas Weisel, in his report Monday. Pflaum, who has an outperform rating on the company's stock, upped his revenue and earnings estimates for 2005 and 2006. "Our checks reaffirm our belief that we are still in the earlier stages of the growth curve for the broader portable media-player market. PLAY's growth opportunities in the flash and handset market give us increased confidence in the company's mid- and longer-term growth prospects," said Pflaum, whose firm has not done recent investment banking for PortalPlayer. Meanwhile, Jeffries analyst Adam Benjamin reported that Apple will launch "in the next few weeks" a video-playing iPod that will also incorporate PortalPlayer chips. Apple will produce some 4 million to 4.5 million devices in the fourth quarter, which will likely be a boon to the chipmaker's revenue and stock, said Benjamin, who nevertheless maintained his hold rating on the stock.