A while ago, I blogged about this Starfruit shop, that sells SL products, and their RL equivalents. You give someone the SL present, and they can have the RL product delivered as well, nicely tying SL and RL together. The way this works, privacy is guaranteed for all involved.
I ordered this necklace for my wife. She liked it very much, but didn't know that there was an RL necklace on it's way as well - I arranged that for her. Today, the necklace arrived, unexpected of course, and she liked it very much. Points scored: many :-)
Check this store out if you ever need to give someone a special gift!