Because I have nothing better to do with my time I started looking into this on my blog.

The short version:

Looking specifically at distance-based Oneworld partners versus zone-based ones, here are a few examples, mostly from Asia Miles, of where it’s more advantageous.

A lot of people here know about that most of the east coast to Europe is only 60,000 Asia Miles in business class (with one stopover allowed), but so is SEA to NRT or JFK to GIG. In both cases a decent savings over getting the award from the carriers (JAL or AA) you'd actually fly.

The weirdest savings I turned up was using only 65,000 LANPass kilometers (worth between 32,500 and 40,400 miles depending on how you earn them) to go from BOS to DUB, which would be an even better savings in the summer when AA charges peak rates. I haven’t got a LANPass account, so haven’t tried to book it, but if someone does, would you let me know?

There’s a rather long version of this at my blog with more facts and figures – right now it’s at the top, but here’s a direct link to the posts:

http://www.leighwitchel.com/blog/arc...ng_around.html
http://www.leighwitchel.com/blog/arc..._around_1.html

Hope it's of some use!