Pretty much all smartphones are awesome. Regardless of the platform, they do things that would have seemed magical only 10 years ago. But smartphones do have their limitations. Like typing and navigating file structures. AirDroid lets you explore your device and send text messages from your computer.
AirDroid creates a tiny Android server of sorts when it connects to your Wi-Fi network. Think of it like a reverse remote desktop. From your computer's browser you can manage your device. Surprise, IE isn't recommended. You can transfer files, install applications, and manage music, ringtones, and photos. The best feature is the ability to send and reply to SMS messages from your browser.
I'm sending text SMS messages from my Android phone via my browser. I can't stress how great that is. Plus, I'm able to install apps, add music and photos, and check on my device's storage availability from a browser. On the phone, I can check memory and CPU usage. Kindle Fire owners can use it to side load apps from the Android Marketplace. Of course you have to side load AirDroid first.
AirDroid is a free download from the Android Marketplace