Originally Posted By: tanstaafl.
1) Does it use a standard headphone jack? That is, can I use SWMBO's noise-canceling Bose headphones with it sometimes?

Yes with some limitations. The volume controls are actually on the headphone lead and you need to get a special adapter which I'm not sure has been released yet.

Originally Posted By: tanstaafl.
2) Without a display, how do I navigate to a specific track?

Skip skip skip skip skip

Originally Posted By: tanstaafl.
3) Can it remember my playlist location on power-up the way a "regular" iPod does?

It should do.

Originally Posted By: tanstaafl.
5) Can an iPod Shuffle battery be replaced by mere mortals, or is that a specialist job?

You need to be able to solder to replace the battery. There are guides online that show you how to open it.