Do these already exist? Does anyone have any real experience with highload applications using the meteor.js framework? Are there any such known services or applications or designs based on this technolody?
update apr 4, 2013: since we were not able to scale on Heroku due to Meteor's session affinity, we moved to EC2 with ELB. We've tested this with about 800 concurrent users, which is 4x what we were getting with Heroku. FMI: [1] http://www.ripariandata.com/blog/creating-an-aws-elastic-load-balancer
update jan 18, 2013: we've done some load testing on our app using blitz.io. On a single heroku Dyno, with a MongoHQ back end, we are able to get to 35 concurrent operations before timeouts start exceeding 1 second. We able able to get to 180 concurrent operations before the Dyno dies and needs a restart. This was against our most complex query using a five field compound index, returning between 10-30 documents, and randomly using a skip value of 0-30 (to simulate paging).
Currently, increasing the number of dynos had no substantial increase in performance. We are investigating the bottlenecks and will report back our findings.