I understand that 1.7 brings better user-visible behaviour of tree conflicts, of a kind enabled by WC-NG: in "svn update", for example, I think the base version in the WC is now always updated underneath any tree conflict victim, which means no further update should be required after resolving. I haven't tested that, so may not be quite right.
In CHANGES I can see notes about a few minor improvements to conflict reporting and bug fixes to conflict detection, but nothing about the above kind. Are there other improvements worth mentioning? - Julian