While Pandora was likely cautious on its last report -- a beat for the November, December, January quarter would not surprise me -- its stock does not trade on the basis of a business outlook. No doubt, it dropped on disappointing guidance with its most recent report, but, again, it refuses to stay down. Ultimately, it trades on noise. Almost every time a competing service gets announced the stock takes a hit. Samsung announced one. Pandora went down. Lowly Nokia ( NOK) and Research in Motion ( RIMM) came to with feeble offerings. Pandora dropped. Then, of course, there's Richard Greenspare of BTIG Media who is due any day now for a cautious mention on P (that's what Briefing.com always calls them). With guys like that unfortunate parts of the conversation, you can never know what to expect. Rumors of a streaming radio product from Apple ( AAPL) have hit Pandora harder than any other. While I don't see the sense in Apple getting into Pandora's business -- it's better off seeking a partnership to integrate Pandora or another existing service into iTunes -- a credible person or two tells me it's only "a matter of time" before it happens.