It is very good news, and I hope that more Linux distributions can work to do the same.
In order to freely distribute Sun's VM, someone needs to pony up the cash, time & resources for certifying it on the respective platform. Most volunteer-run distributions don't have resources to spend on that, and tend to have no trouble finding better things to do with the limited resources they have.
You can't just put Sun's proprietary JVM implementation on an FTP server (legally), since the BCL does not allow free, unencumbered redistribution. Sun's BCL license only allows redistribution in special cases, that make no sense for free software operating systems distributions.
As a distribution, therefore you need a contract with Sun covering trade marks, re-distribution rights, allowing you to make modifications for packaging, etc. It's not a trivial matter, and you need to spend some serious money on the lawyers to avoid leaving yourself open to interesting post-facto 'interpretations' by Sun's legal. See this thread
on the "NOTICE FROM SUN MICROSYSTEMS" for a lesson on that.
Otoh, commercial GNU/Linux distributors (Sun, Red Hat, Novell, Mandrive) have real, (presumably expensive) contracts for redistribution, since they can have a financial benefit from providing proprietary Java implementations to customers that pay for it (for example, via subscriptions). They also can afford to have their lawyers hammer out legal agreements with Sun that don't hold surprises.
Beside the legal issues, there is also the issue of forcing redistributors to pay Sun for a license to use of the Java trade mark, which you have to do if you are an OEM distributing FreeBSD + the respective port of the proprietary Java implementation. Volunteer-ran distributions are unlikely to enter such agreements, since they have no interest in attaching an obligatory redistribution fee on their works, in general, as proprietary implementations are readily available from Sun, IBM, and the likes. Uncertified for the distributions, but still working passably, which is what people really care about, in my experience.
So asymetrical, 'single-node' redistribution agreements are not going to work well for Debian, Ubuntu or Fedora, and entering them is unnecessary for the distributions since the users who desperately wish to run a proprietary JVM can do and get one from one of the proprietary JVM vendors.