Yeap, bards can use them. Using them directly, it's just spells on their spell list, so many of the items may be of partial use at best.
Plus, bards get the use magic device skill as a class skill, which at epic levels lets them use just about everything. (Note that "use a wand" also covers use a staff as listed in the skill description.) For example, if you have a staff with a spell you want, it's a flat DC of 20 or emulate as if it was on your class list. And since staves already let you use your own CL and bard gets full advancement, it can be pretty sweet. Plus UMD lets them use just everything else as well. With 23 ranks (from 20 levels of the skill-point-heavy bard) plus charisma which should be very high for an epic bard, you've got everything made. The hardest to actual active (besides just deciphering) is emulating an alignment at DC 30, which you shouldn't be able to miss.
Have fun,
=Blue(23)