if you have the cash, jump to a body with a built-in motor. AF-S lenses, from what i hear, are very poor value.
No, AF-S lenses are an excellent value and the term is analogous to Canon's USM. The problem is that most Nikon primes have not yet been updated to use the AF-S system.
Enthusiasts on a tight budget (i.e.: people buying a $500-$600 body/lens combo) would like to be able to grow into Nikon's system. The newer zooms and telephoto primes, both consumer and professional versions, all have AF-S. This group of consumers doesn't want the consumer zooms and can't afford the pro stuff. The older primes would be ideal for them, but the absence of a focusing motor internal to the body prevents these customers from making full use of the older prime lens designs.
Of course, there are alternatives. Buy a D90. Buy a used body - I would rather have a used D70s than a D40, for example, it's probably a marginally better camera. Or buy a used D50 since it has an internal focusing motor. Or do without autofocus sometimes - I managed without it until 2003 when my trusty old FE finally bit the dust.