Arrow Electronics interview questions

I applied for the Engineer position in Jan, 2010 and I got an intial email communication in March 1st week regarding a phone screen. After 2 simple phone interviews I was called onsite within one day after my last phone interview. The onsite interview was supposed to last 3 hours and it went really well. I was asked a few technical questions in the first round which was in Core Java. It went on for 45 mins. Later was a technical and HR interview by the manager for 1 hour and another HR interview by another manager for 1 hour. After 2 weeks I got an email saying my interviews went really well and they are interested in employment. I'm yet to receive an offer from them and I have been waiting since almost a month now. I have contacted them almost every week to receive the same reply its in process. I have decided not to wait any longer for them but just wasted my 2 weeks time doing so. I feel if the company is not interested in hiring, then they have no reason to initiate a conversation to hire people and waste their precious time and also others.