ReadWriteWeb

All the time on the Web, things are happening. Comments are being left, blogs updated, messages sent, tweets tweeted, and so on. If you're an information junkie, then you don't want to know later, you want to know now.

One way of knowing now is setting up a mobile notification app, like Boxcar, to let you know the moment everything happens when you're out and about. But what about if you're sitting at your desk? For that, the company has just released a desktop version of Boxcar for the Mac and the app is soon on its way to a number of other devices and platforms.

The latest version of Boxcar, the push notification organizing app extraordinaire for the iPhone, has just hit the app store and with it came a couple new services that we think you (and many of your bacon-eating, narwhal-loving friends) are going to really enjoy.

Version 4.1 comes with expanded Twitter support, a handful of usability updates, and support for Foursquare, Gowalla and, you guessed it, Reddit.

A few days ago, we reviewed iTwitter, one of the earliest iPhone 3.0 Twitter apps to support push notifications, but one major let-down of iTwitter is that push notifications only work when both parties use the iTwitter client. Today, however, Boxcar arrived in the App Store (iTunes link), and this client actually polls your Twitter feed every 5 minutes and sends out push notifications whenever a new direct message or @reply arrives. Messages sent between Boxcar users will be pushed out immediately.