Startup Idea: Excel Add-in for Live Stock Prices

Startup idea to develop an Excel add-on that simplifies the process of bringing live stock prices into worksheets directly from the internet. The add-on should allow users to input a series of stock tickers and automatically fetch the corresponding prices.

I Wor in Finance and its very hard to pull prices for stocks without using Bloomberg, but google and yahoo have the same accuracy and can be used for most of my work. I want to bring live prices into excel and Know there is a way to do that but it is to complicated for me to follow the macro so it would be ncice if there were an add in that would do the tough part for me and allow me to put in a series of tickers and get prices loaded from the internet instantly to my excel.