Sony has dropped their new PSP Entertainment Pack, which featured the PSP 3000 plus a 4GB Memory Stick Pro Duo, which is why online retailers have cancelled all pre-orders over the weekend. According to an entry by Sony Computer Entertainment of America's director of hardware marketing John Koller, the reason is that people seem to be a lot more interested in another PSP pack:
Based on ongoing discussions with our retail partners and the feedback they have received from their customers, SCEA has seen significant interest in the Ratchet & Clank Size Matters PSP Entertainment Pack in North America, which includes the updated PSP-3000. As a result, we will be streamlining our PSP hardware lineup and will no longer be offering the previously announced 4GB Memory PSP Entertainment Pack. Consumers who are interested in a larger capacity memory option can purchase a 4GB PSP Memory Stick PRO Duo, which will be available this fall for $44.99 (MSRP). The Ratchet & Clank Size Matters PSP Entertainment Pack will continue to be available in Mystic Silver in North America, and, starting in December, will be available in Piano Black.