Flash and payment gateway integration

I’m trying to look into integrating a flash shopping cart/full flash site, with a payment gateway like Authorize.net.

anyone have any experience doing this? I’ve been looking at the authorize.net documentation…

is it possible to interact with the gateway without any server-side code?

any snags or advice i should know about (especially concerning authorize.net)?

I don’t need any code samples or anything, but if anyone can comment on feasability, potential problems, etc. that would be great!

thanks in advance!