I missed that Foursquare was sold recently. Former CEO Dennis Crowley has a good blog post reflecting on the company:

I was heartbroken by this ending. There are so many people who put so much time and energy and passion and love into building Foursquare – the company, the products, the brand, the culture.

I’m still using Swarm. Micro.blog can import Foursquare data into your blog, but Swarm export barely works. Time to rebuild all of this on open standards.