2/10/13:

Dusty is awesome and name has stayed.  I love his stripes on his tail and around his head - but his middle section is leopard spotty!  He's SO CUTE!
I was worried for the first 24 hours as Spooky was aggressive and I had to keep them separate.  By the end of week 1 Dusty was rolling around and wrestling for fun and Spooky was playing nice.  Tiffany is happy she's not the target for wrestling practice anymore.  The dog, Blossom, is pretty good but still needs the occasional reminder not to chase.
Spooky is definitely my "cool cat".  He has the coolest, most confident attitude while still being super loving and laid back.  He gets a little jealous if he doesn't get enough attention and likes to pout, pretending he's not enjoying cuddles....but after 2 minutes the purring starts, he's all cuddly again and he starts drooling.  
Dusty is the lover boy.  SO SWEET!  There's no "cool cat" - just sweet, sweet, sweet.  He looks at people with the most sincere expression and is so eager to have someone pet him.  He will sleep on his back like a little otter, with the most contented little expression - almost a smile!  It's really funny but so very sweet.  He's pretty active and eager to play.  At first, he preferred to play with people - wanting a person to wave a ribbon or cat toy, vs. playing with Spooky.  Now, the kittens play chase, bat toys around to each other and even share a cat bed at times.
Spooky is most willing to be carried around by Mark  and I'm suspicious he may actually like it....Dusty, not so much.  Dusty likes Mark but leaves when he's tired of being a feline action figure for a 5 year old.

Mark is enjoying having two cats (Tiffany is "mine") and I'm enjoying watching the kittens grown.  Dusty is as big as Spooky now and I expect he will be the biggest of three cats in no time.  I'll send pictures as soon as possible.  I'm heading out for a business trip but I'll try to get something to you with in a week or so.
Bottom line is that everything is great.  We've acclimated well and we love having Dusty in the family.

As always, thanks for the awesome recommendation!  You really have a knack for great placement suggestions!