I'm a good html css developer and I feel comfortable modifying any other language, so this php should do the basics: to pull info from facebook and store maps in database for users. The info can be rendered in the most basic way, and I'll format it later.
PHP to allow facebook users to create multiple markers in a map by address or click on map, with the ability to upload a photo and description.
There are TONS of open source mapping working php google maps examples. I just need one that allows facebook users to create the markers. You can do it as php from scratch, using api classes, Ajax, Jquery, wordpress plugin, wordpress function, php forms or any way is faster for you.
I'll take care of design and html coding.
Of course users should be able to edit and delete entries.