Official openSUSE Repositories
Please refer to openSUSE page to receive more up to date information: http://en.opensuse.org/LXDE
openSUSE provides official packages and repositories for openSUSE 11.2 and higher. If you want latest and greates you should use openSUSE_Factory packages, otherwise the official distribution versions.
Community Repositories for openSUSE
Installation via zypper is available for openSUSE 11.2, 11.3 and 11.4
# zypper ar # zypper in -t pattern LXDE
Read swyear's blog for detail (In traditional Chinese).
Some latest packages for SuSE and openSUSE can be found here, like pcmanfm and gpicview.