Great news! IceFrog has just posted on his profile page that DotA 6.77c will likely coming this month. It will contain some of the changes that should be included on the DotA 6.78. I'm not sure why he won't directly goes into DotA 6.78, but my guess, IceFrog want to give us some updates while he still keep developing the DotA 6.78. Curious....
DotA 6.77c Map Download:
DotA 6.77c Map
DotA 6.77c Map Download:
DotA 6.77c Map