Be honest now, how much support do you need?
I have been using word since about 1997 and I have never needed to call support once.
The issue I think is that Word 2007 documents are of a different format than those of 2003. The worry appears to be that the format would not carry forth in the new release. As long as the 2007 'docx' file format will be continued, I cannot see an issue.
It is said by Microsoft that the XML infringement is only a small, rarely used part of the program and should not affect those who are already using the 2007 version.