I think its not opensource so and now in the hands of a enemy of the free software world. So I think itīs not worth updating on it.
Phoronix: VirtualBox 4.0 Beta 2 Is Already Here
It was just on Monday that Oracle released Oracle VM VirtualBox 4.0 Beta 1 with the introduction of "extension packs", OVA format support, ICH9 and Intel HD Audio support for guests, a revamped user-interface in some areas, support for limiting a VM's CPU time and I/O bandwidth, and a number of other changes. Three days later, however, this release has been succeeded by VirtualBox 4.0 Beta 2...
http://www.phoronix.com/vr.php?view=ODg5Mg
I think its not opensource so and now in the hands of a enemy of the free software world. So I think itīs not worth updating on it.
Parts are not opensource, but could now added with a closed source addon, interesting idea... The rest you see here:
http://www.virtualbox.org/browser/trunk
Unfortunately VBox still has some annoying USB limitations it looks like. A windows guest for example will not see my Hauppauge HD PVR but with VMWare workstation it sees it and functions fine.
Did you install the addons for usb 2 support?
And it was active in the settings? Basically it should work. A printer usually works with 1.1 too. I hope you are in the vboxuser group? That's required.
Have you used "USB filter" for your Hauppauge HD PVR? It should work. USB filter gives the guest raw access to the USB device. Even if the host has no drivers, it is no problem. The guest gets raw access.