Apple (AAPL +0.4%) roundup: 1) Suppliers are shipping a "large number" of parts for a cheaper iPhone, says Taiwan's Commercial Times. A 28nm app processor made by TSMC (TSM) is said to be among them. 2) iBookstore chief Keith Moerer says Apple's e-book sales doubled last year, and thinks its e-book share is at ~20%. John Paczkowski notes Amazon (AMZN) and Barnes & Noble (BKS) have been assigned shares of 65% and 25% in the past. 3) The minimum purchase needed for an iAd campaign is now only $50. It once stood at $1M. 4) Reuters' report about Apple mulling a $99 price for its low-cost iPhone is raising eyebrows, given the cheapest iPhone now goes for $450 unsubsidized. Was a subsidized price being discussed?