carls: The Released intro (from tp2001) is lowres and AGA only , later we released an fix version for aga and rtg but also still in Lowres , later on we started to work on a ppc version .... and maybe soon a warp3d version, time will tell.
anyway the XDIV was made to show how it was supposed to look like , everything is exactly the same as in the aga lowres version but we wanted to show it to all in highres.
to view the AGA version video , check
AGA mpeg , some errors in that though but heh best i could dig up atm

if you download the intro (64kb) (just do an dd,exe ?)
then you can RENDER the frames manually if you like and put it together as an anim, but be prepared to wait some hours

anyway, to your question...yes its aga and its 68k. , also unlike mental this intro uses 1x1 so the speed of the production is slower , mental was designed to run in 25fps while dolphins dream was designed to run in "whats possible

" , and
several tests have shown: 030 50mhz 3 FPS , 040 40mhz at 5fps , 060 50 at 8 fps and 66mhz at 12fps and 80mhz 060 at 18-21 fps.
so basically it works on almost any aga amiga but heh i would rather not try to..., 060 is really minimum if u ask me but by all means its viewable and still amazing even on a 040 25.
As an important note, remeber its realtime and its AGA and 68k but most of all its a 64kb INTRO, and it has a plot/story and its truecolor (aga or rtg) and has 16bit audio (paula only).