It has gnash 0.8.10~git20110618. I have not tried it and that PPA contains many applications, some of which could be non-free (I have not verified this). So if you decide to use that PPA, keep in mind the issues related to external repositories.
If you want to test it, you could have a look at this PPA:
https://launchpad.net/~dnjl/+archive/multimedia/+index
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