Can you make a Subject line?

Like on Facebook where you can write what you are up too or how you are doing is there anyway you can do that?

The Only Way would be to create a Profile Field in Admin Panel>>User & Groups Tab>>Profiles>>Click on the Green Plus>>Type of Field>>

Type :Text Zone
Name: What ever you want
Description : Anything
Obligatory If you want it to be
Preview :Pick what you want and you can pick both
Everything should be easy to pick what you want.