Ask HN: Best framework to build RIAs?

Hi All, I just wanted to ask you all for your advice... I already have a great idea, I have done the market research, the funds are in the bank, I am moving to SV mid July and I just cannot wait to launch my product!!! Unfortunately I am not a hacker :( ... although I do know my stuff - I have a technical background but went from student (Computer Science) to being a business analyst for IT & Web companies...

So I have a couple of questions I wanted to ask your advice on: 1. What do you think is the best framework to build RIAs? 2. Do you know if it is very hard to find kick-ass flex developers?

Many Thanks! R