AWS is just virtual Windows servers, it's nothing special or magical.

Hi Jay. Yeah I know in general but as customer doesnt have IT staff and we dont offer those consulting services or have any experience with that, we need a vendor that recommend best configuration for our Sage 300 environment and do all tech stuff to go live so...AWS is selling by Amazon directly or through vendors? Thank you

There are many companies offering hosted Sage 300, one example is www.adssglobal.net/hosting.html
Go with a company familiar with Sage 300, with Amazon you're getting server space without Sage 300 expertise.

Thank you

Any other reference of a company offering hosted for Sage 300?

Rackspace

Umm, how about Sage 300 Online.

Thanks Terry...we are in Mexico so we need a few integrations and custom developments for local requirements and also some third-party add-ons (Autosimply) so its not an option for us.

ADSS www.adssglobal.net have done a number of sites in Mexico and are familiar with the local requirements.