My search didn't return useful results. Is there a way for me to share with non-GOGers the page that shows the list of all the games that I have purchased here?

If not, then please add that ability, GOG. Free marketing for you. :) I would have shared my extensive list today, but I couldn't figure out how.

you can use [url=http://www.gogwiki.com/wiki/User:Amok]gogwiki[/url]?

I think that's what those Twitter and Facebook "share" links are all about. I don't use them and I don't know how well they work in practice, but GOG seems to like social stuff so If you have specific suggestion (e.g. facebook plugin) then I'm sure they'd like to hear it.

Also wishlist: http://www.gog.com/wishlist
And may I also direct you to Barefootmonkey's efforts (his greasemonkey scripts may be of use to you): http://www.gog.com/forum/general/barefoot_essentials_for_gogcom/page1
http://www.gogwiki.com/wiki/Main_Page