The bigger thing is for all those snapping up these domains - what are you going to do with them? If you are going to develop them how much do you think it's going to take to market it to make it successful? You will also probably need an existing .com to help facilitate that - so you got carrentals.mobi - good luck getting the .com to help your marketing effort. Is the existing owner of carrentals.com interested in .mobi? It's only - 50/50 chance that they are.
In the end, right now, 1 month from now, 2yrs.. you will STILL be able to get your reg fee for rentcars.mobi or newsnetwork.mobi or emailaddress.mobi, etc.. thats why this is speculation.. might be a flop, but someone else will believe in strong keywords, even if i dont at the time im giving it up for $59.95 regfee/2yrs
Now if your putting up your grandmothers savings account, think twice.
I regged around 70 .mobi's and i could very well lose every last penny! $4200 down the crapper! one expensive lottery ticket huh?
What would you rather do, apply for a non-refundable fee of $1500 for a "premium" .mobi (example, "rentcar" and "emailaddresses" is a premium word) or buy rentcars.mobi/emailaddress.mobi for the reg fee from me? heh