I've just started reading "Mastering Regular Expressions" because, while 
I use them many times in any given day, there's a heap that I don't know 
   and I thought it was time to bite the bullet.

One of the first new things I discovered was lookahead and lookbehind. 
I was keen to try this stuff out, so I powered up IRB and had a go. 
Sadly, 1.8.2 doesn't have lookbehind, so the first cool thing I tried 
failed :-(.

I then remembered that there was a separate regex system called 
Onigurama.  A bit of Googling revealed that Matz had said that Onigurama 
would be adopted in 1.9.  If that's the case, I'll go to the trouble of 
downloading and building a copy of 1.9 myself.

I just thought I'd check first that Matz's plan came to be.  Is 
Onigurama used in 1.9?

Also, is there any roadmap as to when Onigurama will be standard?  I'm 
happy to use 1.9 for my regex learning, but it would be nice to be able 
to use Onigurama for "production" work, too.

Cheers,

Harry O.