A blog by Ryan Breen of CloudFloor
<%= stylesheet_link_tag :all, :cache => true %>
Speaking of connections, the second performance trick in Rails 2.0 implements the host renaming technique I discussed in detail here. The config syntax looks like this:
config.action_controller.asset_host = 'assets%d.highrisehq.com'
I have not seen a more detailed transcript of the presentation, but I hope the asset mapping is smart enough to remember what objects were mapped to what connections. That could lead to suboptimal balancing of connections used on a given page, but the alternative (potentially remapping objects to different hosts on each page) would blow caching all to hell.