Ha! Well, I'd tried that a few minutes ago and it didn't work. I must have had a space in the wrong place. ;-)
Well, I noticed something kind of interesting while looking at the total indexed pages from Google and Yahoo of these different TLDs:
10,100,000 - .us
4,670,000 - .info
3,420,000 - .biz
24,100,000 - .US
13,800,000 - info
6,830,000 - .biz
...I was very suprised to find that .us had 2-3 times as many pages in existance that .biz or .info. After looking at the results its clear that 95% of those results are US government information. I'm not quite sure what spin that puts on all of this ... but definitely interesting to note.
Also, there was a lot of mention earlier in the thread about .biz being a favorite amongst spammers. You know, I was just going through my Outlook Junkmail list (a list I compile as I go my marking unwanted emails) and there were only two domains out of a couple hundred that were .biz. Actually, the largest number was .com, followed by .info.
Seperately however, I did find that .info seems to be the only one of these three TLDs for which some of the high value terms (e.g. [term].info) are actually in use, not just being squatted on.
So, there are a few of my own recent observations for what they're worth. :)