This document describes the new scheme of handling arrays in Scala 2.8. Instead of boxing/unboxing and other compiler magic the scheme relies on implicit conversions and manifests to integrate arrays into the Scala 2.8 collection library.
Links:
[1] http://www.scala-lang.org/sites/default/files/sids/cunei/Thu, 2009-10-01, 13:54/arrays.pdf
[2] http://www.scala-lang.org/sites/default/files/cunei/Thu, 2009-10-01, 13:54/arrays.zip