I think this could be an Argentinian themed week on Google Maps Mania. Yesterday Google Maps introduced road maps in Argentina which should prove a spur to Argentinian Google Map developers.
It certainly provided inspiration for Oh Buenos Aries who worked through last night to provide the first Google Maps mash-up (post road maps).
Hoteis Em Buenos Aires
Hoteis Em Buenos Aires is a Google Map that shows hotels in the Argentinian capital. The hotels are all listed in a sidebar next to the map. Clicking on any of the hotels will open an information window containing a link to photographs and details of the chosen hotel.
Oh Buenos Aries have also created: