I created a map in Google Maps that has an entire map of the subway (including works in progress) and various touristy stuff marked. It would primarily be useful for people new to the city that just have no idea about the location of anything but there should be some value for everyone.
Clicky
I'd like to add more stuff to it - more bars (I don't actually know where they are myself) and maybe the good hospitals (I'd have to look them up) and any sort of landmarks or tourist attractions that I've forgotten. I'm sure there are plenty. Also I started to mark all the stations on the commuter train to Tigre and then realized that I can't find out where exactly they are? Not really a big deal but if someone knows where to find their exact locations then I could finish that. I don't know of anyone who uses the other trains so I just ignored those.
All suggestions welcome.