A quick request from a colleague:
Please send us any RSS feed from the corporate world that you may have. For example, company X RSS channel, analyst Y RSS channel, etc. Note: we don’t want blog feeds at the moment.
I’d assume that they’ve got the usual suspects such as Sun, Adobe, etc. If you’re aware of any more obscure RSS feeds, please leave a comment.
DarrenBarefoot.com 
I have loads of Microsoft-related ones…
This guy posts alot of feeds regularly, and there’s probably more in his old post’s archive.
Oracle‘s got some here, and Yahoo! has their own directory aswell.
-Or, you could search Feedster; a search engine specializing in RSS feeds.
I’m not sure I see what “[no] blog feeds at the moment” means. The (somewhat obscure) sites I know of run their home pages as blogs of sorts, but that doesn’t make them any less corporate:
http://www.navarik.com/home/news/rss2.xml
http://www.navarik.com/home/windward/index.xm
http://www.chamber-of-shipping.com/index/feeds