Is there an app that allows you to send and receive texts from your computer?
SMS Everywhere - Send text messages SMS to cell phones
dunno about receiving the text on the computer but also you can use google voice if you have it setup so it sends from your google voice number, or you can just email the person at their email@example.com if its verizon or you can look up the domain for other carriers such as at&t and so on.
I have this phone tools app(not in the market) it allows you to connect to your computer through wifi and you can send,recieve, and a ton of other activities. When you push the connect button it will give you a url that you type into your computer.