There is loads of great content in this huge city compilation, and (unlike most half-finished huge city articles) has an excellent district structure, but the districting job was left only half done. A CotM might be able to get the articles into DotM shape. Additionally, Wikitravel's Latin America coverage is pretty shoddy (especially outside Brazil), so it would be good to make this a flagship of sorts. Since the content is mostly there, it would be an ideal CotM—one for which contributors could mos one subsection of an article on any given day.
Finish moving listings to districts — there aren't actually that many to do, and some basic google maps reference should allow anyone to do five or so per day in about 15 minutes
Listingify all the listings — another task that anyone can do in small quantities spread out over the month. There are a ton of listings that need this, but doing so will make it more obvious which fields are missing.
Fill in basic details for listings (addresses, addresses, addresses) — another simple task when done in small doses by many contributors, but difficult for one person to tackle throughout so many articles
Replace moved listings from the main article with prose — here's the difficult part; I'll volunteer to do the heavy lifting
Scour flickr for more photos — another basic task made much easier when many people each do a small amount of work. Just take a glance over articles for interesting things, then search flickr for them.
I'd support it, looks like a solid Cotm. I don't know if I can help much, but I'd try. What month were you thinking Peter, Jan? Feb? Keep smilin,edmontonenthusiast [ee].T.A.L.K. 18:55, 22 December 2008 (EST).