nodejs server for sending Apple APNS push notifications
#push
PushMail
Mail notifications on your iPhone. Just set up a mail forward for certain emails, and they’ll be translated into a push notification.
Notifo
Pretty awesome, super-simple API-based service for sending notifications to distributed devices. Has an iPhone + Growl app.
Implementing PubSubHubbub subscriber support: A step-by-step guide
Implementing PubSubHubbub subscriber support: A step-by-step guide
A nice step-by step (with some gotchas) tutorial on PuSH-enabling a feed client.
Gluecon
Conference exploring all the technologies relating to cloud-based computing, mash-ups etc. Looks at distributed APIs and data-sources and how to mash them all together.