Came across this after Googling for a solution. For those who are 
interested, here's the route I'm using to force the cache flush on Heroku

    # utility for flushing cache
    get "/flush_cache" do
      if memcache_servers = ENV["MEMCACHE_SERVERS"]
        require 'dalli'
        dc = Dalli::Client.new
        dc.flush
      end
      redirect "/"
    end


And instructions for adding it as a deploy 
hook: https://github.com/derekeder/FusionTable-Map-Template-Heroku#caching

Derek

On Friday, October 14, 2011 12:31:11 PM UTC-5, Chris Eigner wrote:
>
> Matt,
>
> This is what I did as well. I put it in a route and wired up a Heroku 
> deploy hook so the cache is cleared on every deploy. 
> http://devcenter.heroku.com/articles/deploy-hooks
>

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