Booo they are sooo late. I have been able to do this for 3 years now with the Black Magic Intensity Card. I got so fed up with the HAVA Platinum HD, and Different Dazzle Style devices when trying to record in HD. I have had component splitters, and Y connecters going into DVD Recorders and such.
The Black Magic Intensity card I bought 3 years ago allows me to record Full Uncompressed 1080P from my Xbox 360's HDMI with no problem. I can record from bootup, dashboard, to game and I dont miss anything.
I have never tried this with a Blu-Ray Player, nor while watching movies on Xbox 360 never really even thought about that since all that stuff is I can find on the net all ready compressed which I would have to do myself if i tried recording it with the Black Magic card.
Only downside is you need a pretty decent setup to run this card as intended.
When I first bought the Black Magic Intensity I needed a seperate raid box to be able to record the 1080p raw uncompressed video.
Now I have OCZ RevoDrive X2 220GB and I can record directly to that PCI Express SSD
This would have been a nice cheaper alternative 3-4 years ago but now they are just plain late, and like others have said there software still sucks.
http://www.blackmagic-design.com/products/intensity/