It seems like with XNA everything I am hearing about is Xbox 360 I mean the networking that comes with XNA is 360 only the new avatar feature that I was looking forward to is 360 only, What is available for people who only want to make PC games? How can we publish our games? Is it up to us to find a way to publish our games or does Microsoft provide us a way to publish our games? If microsoft provides a way for us to publish our games could some one post links to where I can find documents on the process?

Currently there is no publishing service for Windows. It's all up to you. There is Click Once deployment that you can setup for your game now for PC which is a very nice feature for building your PC XNA game installer. And you've covered the two major differences between PC and XNA games for what isn't available when you develop for the PC. The nice thing is that even those two things aren't available there's a whole lot that IS available when you go the PC route. Just about any library you want, databse solution, networking solution, etc. is now available to you to use with your XNA game.

George Clingerman:

The nice thing is that even those two things aren't available there's a whole lot that IS available when you go the PC route. Just about any library you want, databse solution, networking solution, etc. is now available to you to use with your XNA game.

Don't forget about not-cruddy floating point performance, a crazy fast garbage collector, and (usually) much faster hardware to work with. The list of awesome libraries that you can't use or are impractical to use on the Xbox goes on for miles - all that is now at your fingertips!

As for actually selling them, you typically do something like this:

1) Create TehAwesomestGameEVER
2) Set up a website for your game
3) Set up shop with Share*It or another of the frillions of payment-processing services
4) Profit!