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I definitely agree when it comes to the code scalability of something like Node.js (although, I haven't built gargantuan javascript applications before, but am going to assume that it's not necessarily a pleasant experience).

Diesel looks great. When looking into alternatives in Erlang/Haskell/Scala, or XMPP/BOSH, either it's not easy to find quick how-to examples, or I'm looking in the wrong places. Any fingers in the right direction would be welcome.

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The Glasgow Haskell Compiler (GHC) uses async I/O to implement all I/O actions (e.g. printing to stdout, opening a socket) and it's completely invisible to the programmer. Bryan O'Sullivan and I have rewritten the implementation used in GHC and GHC 6.14 will offer much better scalability (using epoll/kqueue) than previous version.

Just fork of a thread per connection (using forkIO) and just call normal I/O actions. The implementation will multiplex those forkIO threads onto a single OS thread that calls epoll/kqueue.

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