Hey this is a very small suggestion which should be easy to work out, but really add something to the game.
I'm only playing this game since December but I feel like a total iGP geek, browsing other profiles and spectating live races. I suppose there's more people like me. I'd just love a new tab at Manager profiles (and perhaps for Teams as well) for a Biography. Currently, there's Wall, Achievement and Career for Manager - why not Bio - where managers have 500 characters to type a short story about themselves? I think it would certainly add something to the game. Competing against other managers is the best thing there is, and I'd love to know more about them. Of course, people could still leave their bio's empty if they want to. It would just add some meaning to profiles.
Better late than never. I've just scrapped the "Wall" feature (which got very little use and didn't seem to add anything) and replaced it with an Overview tab that includes a bio.
To write your manager bio click "Edit" on your profile page or go to Account > Settings. You'll find it at the bottom of the page under the Profile tab.