The Mac mini appears to be on the verge of receiving a much-needed update, evidence suggests. A number of suppliers are indicating shipping delays or a complete absence of stock, a common occurrence in the weeks before Apple releases new hardware. One buyer for a higher educational institution says that in placing a bulk order for Minis two weeks ago, he specified to an Apple salesman that the computers would be needed by June 1st. While the salesman assured him at the time that this would not be an issue, the shipping date was last week