Here is what BMP said about Dota 6.60 AI:

Update 1
Been a while since any sort of update or progress, I guess. Life’s been busy, and that usually takes first priority in…well…life. =P
But I’m still here, and working on the map when I can. As for 6.60, sounds like things are going to be overhauled like [...]

File: DotA Allstars 6.59 Ai + v1.52
Author: BuffMePlz (port AI+ v1.52 of RGB)
Date: January 27th, 2009 (update 01/04/09 revision 02)
Size: 3650.8 KB.
Category: Hero Defense
Hello, new dota Ai Release!…
This map is a modification by “BuffMePlz” of the map AIplus v1.52 of RGB…
Description:
Choose from 93 unique heroes in an epic battle to defend the Anciesnts…
AI by RGB [...]

File: DotA Allstars 6.58b Ai + v1.52
Author: BuffMePlz (port AI+ v1.52 of RGB)
Date: January 25th, 2009 (update 25/01/09 revision 01)
Size: 3650.8 KB.
Category: Hero Defense
Hello, new dota Ai Release!…
This map is a modification by “BuffMePlz” of the map AIplus v1.52 of RGB…
Description:
Choose from 93 unique heroes in an epic battle to defend the Anciesnts…
AI by RGB [...]