Planning to export e-services (online services, Internet-based, SaaS) from a EU-based company to the US market, what are key things to consider ?
I don't think there is too much that you need change. Some things that come to mind:
Possible attacks from patent trolls, that is very likely. The fact that your business is registered in EU should help, but it is still a very real possibility that you will be legally forced out of the US market.
Find an experienced lawyer to tell you how you can conduct business in the US and avoid patent infringement liability.