This is great! I need to catch up on the post you made on the talk page, I will tonight hopefully (I am on holiday! Yay!)
Anything I can do to help, of course, it's been one of my "wiki-dreams" to make something like this happen in the US, especially as an active photographer of NHRP's!
I also love the template you created, I've been using it like...crazy (as crazy as you can get with NHRP'S!)
I felt like adding the National Register of Historic Places listings to the big monuments database. I created some templates to handle the entries and set up the database. Today wrote a little bot to convert current lists. Anyway, more info at https://en.wikipedia.org/wiki/Wikipedia_talk:WikiProject_National_Register_of_Historic_Places#Wiki_Loves_Monuments_2012
This makes it easier for the US to join WLM 2012 ;-)