If you're mostly out for .com's, like me, how good does the domain name have to be for it to be wise for you to register the .net and perhaps other extensions, too?
The .net extension is also crowded just like .com. If you are in domain investing, I suggest start doing for .info .biz and .us registration (if you are in US).
Most registration I have comes with .net and .info. I added .biz and .us to secure it.
Lately, I considered buying some names in .com.cn. There are some good leads in .cn extension too. Especially if you have contact on the other side of the world.