I also have the same problem, however if I use Firefox or Opera sites with ssl connection work fine. Still, I can't use Google Chrome (ssl), Safari (ssl), the Mac app store (generally), or the iTunes store (generally). Both the iTunes store, Safari and the app store won't respond, and Chrome displays this error: (net::ERR_TIMED_OUT). The problem persists regardless of what network I'm using. Also, when trying to access the keychain or iCloud, the process will not start (will hang). I didn't have these problems at all before updating to 10.7.2.
Sometimes rebooting helps, and sometimes not. If the problem disappears by rebooting, then it only lasts a few minutes before it reappears. It is very frustrating, especially since there doesn't seem to be any obvious or consistent way of which to fix it.
I'm also using a Macbook Pro 13-inch mid 2010.