That was actually the exact name I was thinking about registering a couple of weeks ago, but decided to hold off after I registered the number 40000 .co.uk & 2 others, but didn't get a positive appraisals for them.
Solid numbers are easy to remember from an advertising stand point. Although they aren't used heavily by companies in regards to domains, I anticipate more use as companies are looking for instant URL recognition from certain advertising campaigns especially TV advertising. Think ringtone downloads , infomercial etc.....