At this point, vendors who are neither shipping nor updating their customers are looking foolish. There are only a couple options. They are either being lazy and disingenuous or they are second and third tier vendors who are truly clueless and not valued enough by their distributers to be kept in the loop. In either case, it doesn't reflect positively or bode well for their currently waiting customers to use them for future transactions. In both cases it's stupid business practice and poor management skills.