As far as i know k3b can burn blueray disc (k3b-2.0.2 is in the repo) but installing it will install some kde packages too...
btw...the latest version is only available for VL7...
Changelog (since 1.0.5)
Port to KDE Platform 4
Always allow manual writing speed selection
Use proper toolbars instead of the toolboxes -> nicer laying out with different styles
Merged CD and DVD copy dialogs
Merged CD and DVD image burning dialogs
Merged CD-RW erasing and DVD formatting dialogs
Merged Data CD and Data DVD projects into one plain data project with Blu-ray support
Merged eMovix CD and eMovix DVD projects
Removed CD copy option "prefer CD-Text". K3b will now ask individually (there is no need to do this if no mounting is involved)
Allow importing of arbitrary sessions into a data project, thus continuing other than the last session
"Clear project" now only clears the added data but leaves the settings as they were (bug 147838)
Added support for files bigger than 4GB via mkisofs 2.01.01a32 and above Do only reload the medium for verification if necessary (depends on the writer)
Support for Blu-ray writing
Support for DVD and Blu-ray writing via cdrecord
New audio ripping pattern %e which is replaced by the file extension
Better support for RTL languages