Use latest version of dispatch-classic (pre reboot)
Use latest available version of ScalaIO, tweak sbt a bit

I don't /think/ you need to cross-compile against both Scala "2.10.0" &
"2.10.1", the resulting artifacts for both of them will just use "2.10"
as the scala version in it's name, and they're meant to be binary
compatible.

+ publish-local works for me with this conf, so hopefully it's all good.