Not just iPlayer
As their tweet says, it's not just iPlayer but the whole site. I started getting 500's about 2 hours ago on the News site.
The BBC's web servers fell over today, taking down its online news and iPlayer services – but it's unclear whether the outage relates to the significant Distributed Denial of Service attack hitting Sony's gaming network right now. Sony's Entertainment Online chief confirmed earlier today that the media giant was suffering a " …
I would have thought co-ordinating a response to a DDoS attack on the BBC would be significantly easier to manage/control (i.e. majority of traffic will be from big 4 ISP's and BBC will have a direct relationship with LINX to manage the remainder in a way that limits the impact on the majority of users).
These are the same steps Sony has already taken, but the BBC has the advantage of an in-country audience (at least for the .co.uk content) - I think it is unlikely this was a DDoS and in the event it was a DDoS I would be surprised (amazed?) if it was related to the Sony attack.
I have a suspicion the number of people wanting to get the first episode of a new series with a new Doctor might well have contributed to the downtime, whether thisalone could have brought it down or whether specifically targeted for a busy time or just coincidence we may never know.
Personally I was going to until I realised I only have to wait until Friday and it's re-played on Three.