I was reading the Yucatan Living website today and there's a new classifieds website aimed specifically at us expats living in the Yucatan and Quintana Roo area. Not much on there at the moment as it's only just been launched, but looks like a useful site to remember You can find it at: http://www.yolisto.com/
Steve - That site was developed by Malcolm & Jillian of the Dropped In blog: http://www.droppedin.com/ And I see that they've just added a section for doing Pet Rescues! That's sooo cool, good for them! I hope people use it.