BioGB v5 is comming. There is a brutal list of internal changes. There will be a simplified list with the changelog, but i will tell some of them now.
There has been a lot of work fixing some nasty bugs. Although there is no new official release yet, the last code from the stable branch on git has lot of bugs fixed.
There may be a new official release soon.
I have uploaded the new custom site for BioGB. There you will find more info about BioGB.
After some time looking for a place to host the project, i finally got to Sourceforge. Now BioGB is at version 4.3. Also the source code can be obtained through git.