Just an aside after a discussion with a friend who uses pkgsrc on linux:
With the tendency for Linux and other systems to build tools such as perl & python into their base systems there is real scope for pkgsrc to be very helpful in some cases by allowing people to install an entirely separate package tree which they can manage and update separately to the base OS tools. A good example is getting perl 5.10 on a 'stable' linux release.
Is this something we should be talking about more?