Yeah, I noticed it a few days ago in my system notices. I will not however install it. The primary reason is this little puppy ---> Update for Microsoft Windows (KB971033) which is one of the updates included in that Service Pack. This update "Phones Home" to M$ every 90 days to verify that the OS is not a pirated copy. Really? Yes, really. Every @&$# 90 days!!! Like I'm going to replace a genuine copy of Win7 for a bugged ridden hacked copy. Give me a break for crying out loud.....
FYI Link: 30+ Windows 7 Features Phone Home to Microsoft