Bing has this article on under-utilised webmaster resources.
But the last bit is what I found interesting. Bing is very hot on indexing now, but they are still offering a direct submission option.
And they let the searchers decide whether your content should sink or swim!We hear a lot of folks saying they don’t see their newest content in the results fast enough. They are concerned we’re not finding it, not crawling them frequently enough, etc. In addition to submitting sitemaps via our tools, you can also submit, directly to our index, any URL from your site....
In related news, Google's share of search dropped 2% for the month and 5% for the year. That's a big drop for the market leader. Bing now accounts for 30% of the search market (Bing grew by 16% and the Y! component by 7% in the last year)