Scott replied to a similar thread
http://www.wowinterface.com/forums/s...ad.php?t=20871 saying that at present he has utilised the normal 120 buttons available in game but will expand them in the future so I guess that sounds like a yes it will get changed.
I also have a druid but fortunately never gone boomkin on her so never had that problem myself. I tend to use that bar as my crafting bar so doesn't get filled up much.