Hey guys if y'all are running the Android Market and its laggy or slow or just simply timing out you're not alone. I had this issue for a week and finally solved my problem. So what's the solution? Install the old Android Market. You can try all you want, clear cache, wipe Market Data, but thats probably not gonna fix it. Here's the link for the old android Market and instructions on how to install it.
[APP] Get your Old Android Market Back - xda-developers