I like 7q7 I own 3z3.net and I just like those short names especially for an email that is super short and easy to remember. Value wise they are reg fee, plenty of them around to register.
Actually none of them were available for registration 2 weeks ago when I checked.
And I'll be surprised if any are right now, since all of them are being registered right after the drop.
I own few myself like r1o.net, v1t.net, etc.
The Chinese love short domains that don't make sense, like yours. The problem is that they can't find them to know they're available. I would suggest that people create a Chinese website to sell their short domains.
I created this site for mine, as an example. http://www.購買.net/
I would consider letting folks here post their domains on my site if there was enough interest. I could possibly create a whole page for it.