FourSquare launches Local Updates from businesses .
"Foursquare Local Updates let merchants send text, photos, and specials to customers who have either checked into a business several times or liked it on Foursquare" (more)
From my institution's Foursquare business page
As we have claimed 6 NUS library venues, we can now send updates to "loyal customers" , and such updates will appear in their friend tabs which typically tell them what their friends are doing and where they are.
It's unclear what "Customers will see your updates when they're close to your locations" means above, but this says
"Starting today, you’ll start seeing updates in your friends tab from the places where you’re a loyal customer. It’s an easy way to keep up with news from places you frequent, including things like new specials, pictures of the latest shipment of shoes, or a serendipitous food truck appearance. The best part is there’s no extra work for you to do: we already know you care about a place if you’ve checked in often or liked it, and will show you updates from it when you’re in the same city." (empathisis mine)
So close to your locations = same city?
If so, effectively this turns your claimed FourSquare site into a Facebook page (for loyal customers within the city which is effectively the whole country for me).
We have more Facebook fans but still a nice bonus.
Also FourSquare doesn't keep track if you have seen the update before, so if you check-in once, see the update, and check-in again say the next day, it will still show you the same update unless presumably a more recent update was posted. Not a big deal though since it isn't that intrusive.
It would be nice if FourSquare used the FourSquare radar or geofencing to automatically send notifications when within range. Something like how location alerts work for the build in reminder app on iPhone. But this might be considered too intrusive.
A even more interesting idea but probably requiring a specialised app would be a library app that would be aware of the loan periods of your books and notify you whenever the due period is close and you are within range of a library or book-drop!
PS : For more details see the FAQ on local updates , in particularly see Who gets my Local Updates? and Where do people see my Local Updates?