AWS + Heroku db

I have my environment on Amazon cloud (AWS-Ireland), and I’m planning on having my postgres DB hosted in Heroku.

I have couple of questions regarding this setup:

1. I know I can choose to have my Heroku db in Ireland as well, in that case – will the connection to my EC2 servers considered in-LAN?

2. Does the Heroku db have pgpool/pgbouncer already installed? Or should I take care of that on the AWS side?