Do .BIZ domain names have any
restrictions? Yes. The .BIZ domain can only be used for a "bona fide business
or commercial use". A bona fide business use is one of the following:
To exchange
goods, services, or property of any kind;
In the ordinary course of trade or business;
or
To facilitate (i) the exchange of goods, services, information, or property
of any kind; or, (ii) the ordinary course of trade or business.
Registering
a domain name solely for the purposes of (1) selling, trading or leasing the domain
name for compensation, or (2) the unsolicited offering to sell, trade or lease the
domain name for compensation does not constitute a "bona fide business or commercial
use" of that domain name.
For illustration purposes, the following do not constitute
a "bona fide business or commercial use" of a domain name:
Using or intending
to use the domain name exclusively for personal, noncommercial purposes; or
Using
or intending to use the domain name exclusively for the expression of noncommercial
ideas (i.e., registering abcsucks.biz exclusively to criticize or otherwise express
an opinion on the products or services of ABC company, with no other intended business
or commercial purpose).
source : http://www.nic.biz/faqs/biztld_qa.html#4