Via rick’s Blog:
If you are allergic to .mobi let me tell you how silly it is as a businessman. If you sell black shoes and black shoes sell well because they are the primary color, don’t think you are a prisoner to black. One day the BROWN shoe comes out. It will never sell scream all the black shoe salesman. Meanwhile the brown shows are selling very well and the profit margins are pretty good. But you are a BLACK shoe salesman. That BROWN shoe is for idiots that know nothing about fashion!! Meanwhile folks are making money selling the BROWN shoes for whatever reason and they are taking some of the market from the black shoe guys. (And frankly who cares their reason because the reality trumps everything else)
Nobody is forcing the BLACK shoe salesman to sell BROWN shoes. But the BLACK shoe salesman has had a knee jerk reaction to BROWN shoes without looking at the other side. The BROWN show salesman are not any smarter. They just do the same thing in reverse. It adds up to a big fat missed opportunity by BOTH sides.
Rick and I are good friends, part of it is because we agree on allot of things but also, a bigger part of it is we’re frank with each other and disagree on many issues as well. So Rick, don’t take this personal (I know you won’t!) 
.Mobi sucks. That is plan and simple. Rick can tell you all day long about the black or brown shoes and that you should sell both if there’s money in both, but while there may be money in both, it is your DUTY to question what is going on. Frank rightfully stated few days ago he questions the validity of .Mobi sales. Yesterday Jay at DomainTools Blog also raises some important questions ,and word is Greg M. of Webmagic, one of the three heavyweights in the first .Mobi auction, is dumping and taking losses (see comment area here). How promising is that?
Here’s another question to ask yourself: What is the story of .mobi? How did it start? Why did it start? It really goes back to a “crowd mentality” issue and other interests you likely do not know about, will never know. There’s this saying “Assumptions is the mother of all f#$^#@s”. If you cannot understand the investment, my advice is to stay out of it. In professional boxing, unless you’re Leland Hardy, it is better to watch from the sidelines then be in the ring. The boxer may win big, but he also may get injured badly. In investments I do believe in taking calculated risks but I don’t believe in “risky investments”.
I do a big favor to .Mobi that I’m even talking about them. Trust me, I know that, they should pay me for this. Even though my take is negative it keeps them in the limelight. Knowing that, I do hope you read the essence of what I write rather then simply the topic, as I really try to help you out.
The bottom line is you should question this thing and question hard, before putting a penny in it. When I look at .Mobi all I’m seeing is smoke and mirrors. Yes, in five years time it may work and be the best thing the world has ever seen, but from where I stand right now, the chances of this to happen are just as good as .Com will end in five years.