If i buy Brink on steam, are the servers connected to all the servers outside of steam?


Also, If I bought Brink at wal-mart, a copy of it, will i have to activate it on steam?

I don't understand your first question? Steam just connects you to dedicated severs, so yes you will be able to play with everyone who has a PC copy.
And yes, you do have to activate Brink via Steam

Okay thank you. Might as well pre-order a copy at Wal-mart to get a box for it than pre-ordering it on steam right now.

If you get it from direct2drive, you can get it for a total of around $40. They are having a 25% off sale. Direct2Drive is a download site though, so you will not get a box if that is a problem for you.

http://www.direct2drive.com/2/9744/product/Buy-BRINK-Download?hph

Enter coupon code "sizzle" at checkout if you live in the US. There is a different code for UK