In a note to investors on Friday morning, an analyst from investment firm Morgan Keegan & Company claimed in-store sales of Motorola’s XOOM tablet are crawling. Morgan Keegan analysts reportedly spoke with roughly 80 Verizon Wireless retail locations, and the tablet is selling at a rate of two units per day on average in each location. While this purported sell-through rate is less than impressive, the firm notes that at its current pace, the XOOM would reach sales estimates of 300,000 units in the quarter. We reviewed the Motorola XOOM tablet last month and said it packed a serious punch. We also said there is plenty of room for improvement with Google’s Honeycomb operating system, however, and that it lacks innovation in its current state.