Frattinghard.com...an amazing site. Good place to read up on your fratty vocab.
Facebook...everyone should know what this is. I am usually always on facebook...although I am not a facebook creeper, haha.
Polo.com...great for shopping...pretty much stay frat. Good sales for all the seasons.
Vineyard vines is somewhat of a new brand of clothing. It's not quite a frat staple yet in the south...but up north it is. Just look at the names of the colors...pretty much amazing.
Lacoste is somewhat of a new frat staple as well. A bit pricey but well worth it.