The online store sells Standalone licenses only. No network licenses. That’s why you don’t see Linux listed (because Linux licenses are always network licenses).
A network license costs about $750 more than a standalone license.
I find it very hard to keep track of new posts on The Area. The View New Post and View Todays Active Topic pages just don’t do it for me.
So I created a Yahoo pipe to combine the RSS feeds for all the Softimage forums. You can find the pipe here:
http://pipes.yahoo.com/softimage/areaforums
The RSS feed for the pipe here:
http://pipes.yahoo.com/pipes/pipe.run?_id=571b2031be0ff54902079c11db49476c&_render=rss
Note that the forum RSS feeds always show the first post of the discussion, so the RSS feeds tell you only which discussions have been updated recently. You have to click through to see the most recent post.
eX-SI 