Wow...um... =)

Maybe some sempervivum varieties? I haven't tried any, but heard there are some that do well in part shade. I know they're tough, and some are really pretty, although I don't know how they are in the long run.

Good luck!

I have had great experience with Epimedium sulphureum, or Yellow Bishop's hat, being very tolerant of dry shade. It was a staple at Fearrington Village when I worked on the gardening staff there for just this type of challenging spot in the garden. The rocks will make for good mulch of a sort, believe it or not!! I also have used:
-Cyclamen hederafolium (sp?)
-Ajuga 'Caitlin's Giant'
-Mazus japonicus
-Creeping Jenny - Lysimachia nummularia both golden and
green forms
I have even have had regular old oregano be dry shade tolerant.
-Would hellebores be too tall? They are doing just fine in my dry shade bed with so little care it is almost abusive on my part :)!
The Bishop's hat has shocked me with its beauty and tolerance of all sorts of conditions.

Hope this helps!! Am so envious of your rocks!!! Have a great gardening weekend!
-amy

Thank you, Amyflora and mBuck - great ideas here! I've already totally wrecked my 'plant budget' for this month, but armed with your suggestions, I'll be assaulting my fave local nursery w/ my fistful of 'blooming bucks' coupons late next week. Now I won't have to wander in there with that 'deer in the headlights' look! I have a plan, thanks to my friends!

Amy, a few of my rocks are leftovers from when I had to pull the dry streambed (stupidly, I didn't make my Garden Elves leave them all, just snagged a few of the rounded river rock variety). Meanwhile, my son works in drilling/blasting (yep, he plays with dynamite) and he'll show up occasionally with rocks of interesting shapes, sizes and colorations. I have a few niches of the above parked waiting for their place in the rock garden. Am itching to put them to better use!

Zig, I had a wonderful purple rock at our old house that I could just kick myself for not bringing along. Did you know that in Japan the gift of a rock for the garden is considered a great honor? Your son is getting brownie points and probably didn't even know it. Can't wait to tell my son (he's only 8) about what yours does. How inspiring!

I thought of another couple of plants:
Creeping strawberry, Saxifraga stolonifera
Vinca major and minor, but think carefully before planting, can be thuggish.
If you ever get down to Sanford, I would be happy to share most of the plants I suggested. I have lots of Epimedium and Caitlin's Giant Ajuga to share. Just ask Adele!! I am always trying to spread the love!