What iPhone push notification services are out there? (Hosted services, not the APNS)

Question

I'm looking to avoid running my own server all the time when dealing with Apple's push notification service. From my understanding, I need a constant connection to the APNS which I can't afford... I was planning on releasing my app for 0.99 or for free and I really don't want to spend a lot of money elsewhere.

After a bit of googling I found sites like http://www.appnotify.com which seems really interesting (and may be a perfect match for me). Are there any other services similiar to this one out there?

Answer 1

I know of these two: appNotifications, and urbanairship.

Answer 2

there are also these two: ilime.com and httpush.com

Answer 3

Watch out for iLime too.

Answer 4

PushIO has great pricing, nothing on their website, but when I contacted them their pricing was better than most of these.