I am using QGIS 1.7.3 (can't get 1.8 to work on my WIN 7 64 OS) and I cannot find the Sextante plugin. I have found other plugins with no problems, accessing all the various repositories, I have a list of many to choose from several repositories but there is no Sextante although the Sextante website says it should be downloadable from the QGIS main repository. What am I missing, doing wrong?
You can find Sextante at http://plugins.qgis.org/plugins/plugins.xml.
Either download it from there and expand it to your .qgis/python/plugins folder, or add the address to your repositories. But I can not assure that it is working as expected on 1.7.3.