Yup, an alpha has been released from Mark. Here is the official announcement.
“hi, here is the Pcsx port for the DreamCast as you probably know already from psxfanatics (hi Keith :), the port was made by Mark Grilenkov, you can get the file on the Pcsx Download Page or directly here PcsxDC v1.3 alpha.
the version is an alpha release (kinda prerelease), so it lacks many things from the linux and win32 versions, read the Readme.DC for more info.
thanks to Skye and Asz for testing it, and of course to Mark for making it :).
the source should be released in the next version of pcsx, the v1.4, that hopefully won’t take too much time ;).
linuzappz”
Don’t expect it to be perfect, but give it a try 🙂 , and post your findings on our forums. Thanks to sp00nz/wagh for the news over at Boob! and Consolevision.