I just found MyWetStuff.com. (Get your mind out of the gutter!)
When MyWetStuff.com launches at 12:01 am (EDT) on Tuesday, September 5, 2006, travelers will for the first time be able to pre-order trial sizes of their favorite liquid-based toiletries and travel amenities, and have their personal selections waiting for them at the hotel when they check in.
I usually check my luggage but for short trips it does seem like a pain sometimes. Since the first 70,000 people who try the service will get $15 worth of free stuff I’ve signed up and plan on trying it for a 2.5-day trip to Idaho in early October. I promise to report the resuts of my inital test.