More details here:
After 6 months of development is born Hydrogen 0.7.2, featuring Oss, Jack audio drivers, export to disk, Midi input and more...Try it!
New release with a completely new graphical interface (now written with gtkmm), is not complete, but is a little step forward... :P
There's a completely new homepage for the Hydrogen project!!
yes...I know something is missing but I'm developing 0.7.1 release that will be released very soon.. :)