I haven't seen this post in a while. It's always good to have a idea of the options out there and my plan is to turn this into a list linked to github pull requests on my website as a easy reference guide for people looking for hosting. Please post below any hosting you know and I'll throw it on the list.
Type: Meteor Hosting Only [No Database Hosting]
Location(s): AWS us-east cloud
Developer Tier: $0.035/GB/Hour, AWS us-east cloud 512MB container size 0.5ECU compute unit
Professional Tier: $395/mo, 5 team members, 5GB included RAM, 1GB+ container size, 1ECU+ compute unit, Pre-Rendered SEO $250/10GB add-on RAM
Enterprise Tier: 20+ team members, 50GB+ included RAM, Varied add-on RAM, Unlimited max RAM, 1GB+ container size, 1ECU+ compute unit. Pricing can be found by contacting sales.