The limit for SES is 10,000 per 24 hours as dirktheman said; you can request more but I haven't needed to yet so I don't know what that entails.

We use sendy.co - it's software you install on your own server (EC2 in your case, I use Rackspace), configure it to use SES and off you go.

I have since gone so far as to code my transactional emails (new user signed up, etc...) to use SES with their PHP samples - It was easy.

I like SES and Sendy so far; we've been using it for a few months now with no problems. Hell of a lot better then trying to code an email campaign system myself and after the initial $60 for Sendy, your just paying the email fee for SES which is so low its negligible.

What kind of emails are you going to send? If they're just transactional emails or a reasonable amount (I believe it's 10,000 per 24 hours when you're starting out with SES, not entirely sure though!) of mass marketing emails it's fine. Inexpensive, pretty easy to set up and deliverability is fine so far.

Yep. SES has been brilliant for me so far, especially when you take into account the price.

I use http://mandrill.com/ . No problem with it yet and it's quite generous in terms of free allowance.

I use sendgrid.com to send e-mail from my ec2 instances.