Which redirects to bing.com, proving that they really have no use for the .bing TLD other than to prevent someone else from grabbing it.
The real problem is can I still type weirdfilename.exe into the browser bar and get to a search engine?
and even if it was available to register, they can reserve words for their own usage before launching it
and if you mean, someone else actually doing the paperwork to get the .bing tld for them, it wouldnt ever be approved.