It was a relatively slow week here on iPhone Buzz, but there’s always a calm before the storm, right? I mean, Apple is having their MacBook event this Tuesday and we’ll be live blogging at 10 a.m. PST over on SlashGear. With this in mind, it’s understandable why iPhone info would be a bit slow.

But that doesn’t mean this blog was quiet this week. In fact, we found out that the iPhone firmware 2.2 has a few extra features no one noticed right away, including Emoji and StreetView support in Google Maps.

We also learned that a big group of current iPhone users actually switched from a different carrier in order to use the device. Plus, the iPhone Developer Tech Talks launched this week, bringing iPhone app creation abilities to a wider audience.

The mini-USB plugs were recalled recently, and now customers are getting their replacements. Funnily enough, they have arrived for many in huge boxes with just an instruction sheet warning customers to return the defective plugs or else.

A heart rate monitor app went live on the App Store this week as well, which makes it easier to keep track of your heart rate anywhere at anytime.

Lastly, we took a look at PhoneTag Voicemail. The service that allows users to view transcriptions of their voicemails by means of a text message or an email, was very useful and for the most part intuitive. Many will find it to be a suitable alternative to the iPhone’s Visual Voicemail capability.