On the home page of my site I use JQuery's ajax function to pull down a list of recent activity of users.
The recent activity is displayed on the page, and each line of the recent activity includes a link to the user profile of the user who did the activity.
Will Google actually make the ajax call to pull down this info and use it in calculating page relevancy / link juice flow?
I'm hoping that it does not because the user profile pages are not very Google index worthy, and I don't want all those links to the User profile pages diluting my home page's link juice flow away from other more important links.
Google itself doesn't crawl AJAX content, but it proposed a scheme to make AJAX content crawl. I wrote a an article to explain that how it works. It also includes very simple code to demonstrate Google Crawling Scheme for AJAX content. Find it here: http://www.tayyabali.com/seo-ajax-content-asp-net-code-to-crawl-ajax
Here is some info on AJAX crawling from the makers of JQuery Address plugin.
For Ruby users there is a gem which handles this relatively painlessly.... google_ajax_crawler Github repo here, writeup about using it for backbonejs at thecodeabode