Replacement hearts that are currently available are too large to fit into folks without "large chest cavities" (including most women), and due to the vast quantity of moving parts, aren't guaranteed to function for an extended period of time.
In Europe Toshiba has officially announced the delay, now anticipating a "quantity of units" of the rebadged HD-E1 due in December and the HD-XE1 slated for 2007.
While the quantity of letters sent is falling, the number of parcels being mailed is growing due to the rapid spread of online shopping and sites like eBay.
Should the United States now disrupt the British program due to its inability to supply D-5 missiles when and in the quantity called for by bilateral agreements, it could have a catastrophic effect on the viability of the U.K. Trident and severely strain relations between two key allied governments.