I am leaving Oracle. My last day will be tomorrow. Since Oracle blogs are for Oracle employees only I would not be able to post here. I will write new posts to my personal just created blog http://troubleshootingfreak.blogspot.com/
This blog will stay, so you should be able to access older entries. Therefore I would not migrate them. Just don't expect somebody will manage comments. If you have questions about old entries in this blog use this page.
Last years I worked on JSON UDF project. I will stop working on it after I leave to avoid conflict of interest with Oracle, but project will live. I don't know if it will be passive or Oracle will find new developer for it, but versions 0.3.3 and 0.4 will be around for quite time. Watch the news!