Scala and the 64 bit opportunity

Just watched Javapolis 07 roundtable discussion where Neil Gafter (@Google) says they are running into 32bit issues today in Java's libraries (int indexes) and expects regular applications to start hitting them soon.

Given nearly all server (and many notebook) chips have been 64 bit enabled for years; the 64 bit operating systems adoption tipping point appears to be essentially here; and > 4GB of ram will soon be common for servers and notebooks:   How is Scala going to address these issues where integer types are used all over the place for indexes, start, and length signatures and internals on built in data types (Lists, etc)?

From a pure technical marketing standpoint, a nascent language not ready for the larger memory solution space could hurt it's adoption in coming years.  

Curious to see what the language team and other developers think.