Transition from VPS(WHM/CPanel) to EC2

I'm in the process of transitioning from a VPS (WHM/CPanel) to EC2.
I've found some great how to's on setting up a machine for the
cloud[1] but I'm not sure the best setup to add some of the WHM/CPanel
features.

Here are some of the features of cpanel I use:
1. Cpanel monitors the services (i.e. apache) and restarts them if
they crash. I'm thinking about using supervisord for this. Does
anyone have experience with this or is there other tools I should be
looking at?
2. I'm running a custom DNS(BIND). I'm planning on switching to
Amazon Route 53.
3. I'm switching to PostgreSQL and I'd like to have something similar
to myPhpAdmin.
4. Creating a backup script seems pretty straight forward.
5. What is the best way to create a firewall to block certain IPs?
I'll have an nginx server in front of apache.

How have others implemented these features? Is there anything else I
should be thinking about? I don't mind a command line interface.

Brian

[1] http://blip.tv/pycon-us-videos-2009-2010-2011/django-deployment-workshop-3651591

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