Can I use rattle on 64-bit R?

Trying to install rattle on a windows server 2008 R2 64bit machine, using 64-bit R ver2.11, I got the following message:

install.packages("rattle", dependencies=TRUE)
Warning: dependencies ‘RGtk2’, ‘rggobi’, ‘RSvgDevice’, ‘Biobase’, ‘multicore’, ‘marray’, ‘affy’, ‘snowFT’, ‘Rmpi’, ‘rpvm’ are not available

When I tried to install one of them:

install.p开发者_如何学Goackages("RGtk2")
Warning message:
In getDependencies(pkgs, dependencies, available, lib) :
  package ‘RGtk2’ is not available

Finally I noticed this and this. Should I go back to 32-bit R in order to use rattle?

Thank you

I was trying to use Revolution R for Windowswith Rattle, was told currently RGtk2 is not available on 64 bit, but the next release (in April or so) will support it

Why not 64-bit Linux?