You guys have probably already come across many of these, but i think ill post up a short list anyway.
I think that they provide very good info on many different aspects of SF4 in general. They cover char info, perspectives, matchup approaches, specific vids etc. So they may improve your game quite a bit if you can apply to them.
http://humanbomb-sf4.blogspot.com/
http://tokidoki77.blog138.fc2.com/
http://gamerbeetw.wordpress.com/
http://airryu.blogspot.com/
Zos'la http://zosla.blogspot.com/
That AIR logo is amazing.
love tokidos blog,
"Now I'm in Hafiz's house.lol
Hafiz made his country food for us.
Curry and Briyani rice　were very good.
I like coconut milk's taste!!!
Spicy chicken is nice too.
But I didn't know why there are omelette.lol"
haha