Hi.

Please take a look at the Sparc AT guide[1].
If you want to help, you can hang out in #gentoo-sparc on the freenode
IRC network, look in the "Gentoo on Sparc" forum[2] at the Gentoo
Forums[3] or search for sparc bugs on https://bugs.gentoo.org[4].
Do you have any SPARC box with new processors (T1 or T2)[5], enterprise
gear, "weird" or rare devices? Can you do tests locally or only
remotely? Can you test disk and or boot-up software[6]? Do you have
a graphics card and can test X and DEs?
What type of software are you able / willing to test? Are you willing
to run the testing branch or to test packages to mark them stable?
Can you test server packages? In a "real" environment? Are you willing
to test X and any DE?
We can use more people running ~sparc and testing packages for doing
keywording. If you run any server applications, in particular in a
production environment, you can also help with testing packages to
mark them stable. We can also use help testing major DEs such as
GNOME or KDE.
Don't hesitate to reach us in the #gentoo-sparc irc channel, mail
me individually or sparc@gentoo.org and to make us any question.

 [1] - http://www.gentoo.org/proj/en/base/sparc/at/index.xml
 [2] - https://forums.gentoo.org/viewforum-f-27.html
 [3] - https://forums.gentoo.org
 [4] - https://bugs.gentoo.org/buglist.cgi?quicksearch=assignedto,cc:sparc@gentoo.org
 [5] - http://www.sun.com/processors/UltraSPARC-T1/
 [6] - Packages as parted or silo