BP has a open suggestion line that has taken many thousands of ideas. As I understand it you can submit the idea via computer but I've also heard they are mailing out packets and maintaining a second track for the more interesting ideas via mail and e-mail.

At one time there was mention that every submission would be reviewed by a BP engineer.

http://www.washingtonpost.com/wp-dyn/content/article/2010/05/30/AR2010053003173.html

http://news.discovery.com/tech/the-4-feasible-oil-spill-ideas-from-the-public.html

http://www.cbsnews.com/stories/2010/06/02/national/main6541297.shtml

The CG also has its own process.

There is no shortage of ideas but engineering isn't just a matter of good ideas. It is usually a matter of a good idea, typically based in specific knowledge of the field involved, well and fully communicated to someone who is, by way of politics, money, or disposition sympathetic.