I'm using NextGen 1.8, have made some custom template and use the image browser, so i have one picture per page (some kind of detail page).
On this page I want to display a facebook-like button for each of them, which was tricky but is working now. To make this even better I want to integrate the OpenGraph API on those detail pages (for preview image and better description). Unfortunately the image is only available in the imagebrowser.php and not in the header.php or is there a way to use the wp_head-hook?
To use the API it's necessary to add some tags in the <head>, that's all (I hope).
Describtion of the API: http://developers.facebook.com/docs/opengraph/
Can be tested with this one: http://developers.facebook.com/tools/lint