Of course someone has. Tobias Schneider has been working on Gordon and built his first full release in June.
Gordon is a little behind in terms of version support:
In this build, Gordon can read and parse all valid SWF’s, even if they are compressed with ZLIB, but plays only SWF1 files completely, as well as the most of the SWF2 features.
The Adobe SWF specification is now up to version 10.