Thanks to flyguy97 on code.google.com we finally have Sopcast for Linux made very easy.
Installation notes here
Download it here
Make sure you install correct version depending on your architecture (32-bit or 64-bit)
And probably you need to install "sp-auth" first before installing "sopcast-player" which is the procedure I followed.
Of course you can download the source and compile it for you own version as well :)
Btw this was tested and used on Ubuntu 8.04 (Hardy Heron) by me, yet to test it on Fedora.
After trying to use Sopcast via the CLI, this was a welcome relief :)
One more helpful link whose procedure I was about to follow before I found the above ^
ubuntuforums.org as usual !
Post in the comments if you face any problems :)