Seems ok for me too. I did have problems over the weekend and there were reports earlier that Store and many other services were out due to Azure issues.
If you're having problems with the Windows Store, you can always try the wsreset.exe command. That will clear the caches for the Windows Store and often fixes many issues related to accessing the store. You can search for it from the home screen or run it from a command prompt in the desktop.
My store was down all day on Sunday I think I was. I tried the wsreset and didn't have any luck. After a 2 hour hold with MS support I was told it was a known issue and they were working on it.
Since then, it's worked then not worked all of this week. It's an issue on MS end and I assume they have no clue how to fix it since for me at least, its been going on for almost a week..