After installation of OSol 2009.6 (build 111) i’v got some weird problem:

root@cheetah:~# pkg install amp
Creating Plan \                       
pkg: The following pattern(s) did not match any packages in the current catalog.
Try relaxing the pattern, refreshing and/or examining the catalogs:
 amp

Solution is simple:

root@cheetah:~# pfexec pkg set-publisher -O http://pkg.opensolaris.org/dev opensolaris.org

Some pieces of explanation is here : http://opensolaris.org/jive/thread.jspa?messageID=368732. Is short: need to use developer repository.