This is a great idea. I personally over-optimize my travel planning. Being able to reference peer recommendations with tags would be a significant improvement over travel sites and Google searches.
Glad to hear! I agree, and almost always reach out to several other traveling friends for their recommendations whenever we go places. I envision a lot of value being delivered from sort of formalizing the FB Recommendations engine into its own social network and interface.
Feel free to drop me some feature suggestions if you have them: adamp319@gmail.com :)