Re: quote from grazcoin above (masterchain.info wallet/DEx)
It looks like you need to create a new wallet first and then search for your mastercoin/bitcoin address.
Once you find the address you can add it to the newly created wallet.
Are there any official instructions for beta-testers for the wallet and DEx, like where to acquire test mastercoins and where to report bugs?
Westphalian, Marv has been putting together the test plan for DEx at
https://github.com/marv-engine/QA/blob/master/MastercoinDistributedExchangeTestPlan.mdRegarding bug reports, Grazcoin may have a preferred location, but you can ask the devs for their preference, and to receive TMSC.
Still finalizing the formal version of the above.
Grazcoin, this is looking exceptional!