I want dtrace for Linux

I've been reading about dtrace for years but after watching this amazing presentation I finally understand how cool and clever it really is. If the Ruby dtrace support is a tenth as good as the one for Python christmas will come early this year. The only problem is of course that we run Linux at Netemic and there's no dtrace for Linux, but we can at least run it on our Mac development machines when Leopard comes out (since Leopard will come with dtrace installed!).