I've been having problems getting on PSN since last Friday, as well as having problems getting to blog.us.playstation.com and us.playstation.com, however, I was able to access community.us.playstation.com just fine. I think my problems were related to Prolexic's servers blocking my traffic; all three of the problem services go through their servers, and Sony had hired them to prevent the DDoS attacks from Anonymous.
Now, what I've been reading in various forums is that the current outtage isn't caused by a DDoS attack, but some are saying that the PSN store was compromised, and things were made free to buy. There's also a YouTube video from Anonymous telling Sony to watch out, because they're going to face their worst attack yet (April 16 is mentioned in the video).
Whatever the case, I hope that things can be worked out and we can get online again. I hold no ill-will against Sony, it's all directed at Anonymous.