If you've been longing for a BBM-style chat and text client on your iPhone, you can stop holding your breath — Hello! has arrived. This mobile-to-mobile messaging service works like BBM by assigning you a PIN so you can keep your number a secret, and all of your texts are free since you aren't using your SMS plan. Plus, Hello! is available worldwide as it works on 3G, GSM, and WiFi networks, and lets you chat with a group of friends all at once. Additionally, push notifications ensure you don't miss any messages, and all of your sent or received photos and messages are saved if you're offline. It's a great alternative to SMS since you can save a few bucks in the long run.
The iPhone and iPod Touch version of Hello! is available now through the App Store for $2 (free if you don't mind bothering with ads), in BlackBerry App World for your BlackBerry smartphones, and is arriving soon for Android devices.