mitchellhislop

This plugin ties into Foursquare’s remote tip/todo functions, which in turn allow a website operator to 
easily embed the buttons. It was developed by <a href="http://mitchellhislop.com" rel="nofollow ugc">Mitchell Hislop</a> of <a href="http://smcpros.com" rel="nofollow ugc">SMCpros</a>

WP-Foursquare Todo Adder

This plugin allows a publisher to easily add a foursquare todo button to a post.

fdqps

‘Save to foursquare’ Button for your blog posts. 
Connect with your visitors in the real world! 
When you add the ‘Save to foursquare’ button to your site, your visitors can easily get foursquare reminders from you when they’re near the places you suggest. Best of all, it only takes a minute to set up.

Save to foursquare

‘Save to foursquare’ Button for your blog posts.

WP-Foursquare Todo Adder vs Save to foursquare