Our site is growing fast & the last few weeks, we've been running into a few scalability issues. For reference, this month we're generating more than 600,000 unique visitors, and on a given day, we get an average of 350K unique requests between robots, users, pageviews, stylesheets, etc.
The site is all running on one webserver, which runs apache, mongrel, and posgressql. I know we're not the "biggest" site out there running RoR, but it seems like we have to be in the top 10-20. Is there an official list of the largest sites running RoR? The reason I'd like to know is for example, the guys at 43things post a bunch of technical info, same with the revolution on rails blogs, both of which are huge contributors to the community & my own understanding (I'm the marketing / product guy, not the technical wizard).
If you know of any good lists like this, or can send them to me, I'd really appreciate it. Thanks!