This has been a long time coming... but finally... for those that don't regularly check our 'What's new' page on yum.oracle.com...
We started building the kernel modules and guest additions for VirtualBox guests for Oracle Linux 6 and 7 (UEK4):
The main reason for doing this is to make it easy to have a guest with the additions installed. No need to install gcc and kernel-devel etc... it makes the image smaller or even if you remove gcc etc afterwards you have to compact the filesystem again and so on. Anyway... I hope people like this. I think it's pretty cool and I will use it a lot when building VirtualBox guest images.
On a side note, my previous blog post about yum in OCI... someone asked if we plan to do https as well as http. Yes, we plan to do that it's being worked on.