I am sure I know the answer to this but I am going to throw it out there anyway...

I interview two weeks ago at a company that I am very interested in working for. I interviewd on Wens and the next Tuesday they called me for a phone interview which I had last Thursday. I thought it went very well and they said they would let me know either way. Its now a week later and I havent heard anything...I sent a thank you letter after the first interview and a follow up letter yesterday. How long does it take for a company to make a decision? I feel like I have been waiting forever. I dont know what to do anymore...I am still applying to other jobs aand having stopped looking but its just seems like I have been waiting forever.