If the control scheme worked with diablo 1 on psp then it can work with diablo 2, and the ds cant even run diablo 2; the specs are to low.
Just as someone already mentioned at the beginning of this post (sry don't remember the nick), the psp is a completely different architecture than the pc, and the ds is also different. So there is no point in comparing the specs, they are meaningless in comparison to the pc. just look at the ps2 specs and then look at the graphics it could run like ff12, tekken 5, gran tourismo. do u think a pc with the specs of the ps2 could run games like this? i don't think so. so specs don't mean anything here. and for this reason, the ds would be a better choice for d2 and i think it would be doable with a proper port, not an emulator or sth like that. just look at ff3 or 4, it runs even with 3d graphics.
the point of porting d2 onto a portable console is another topic though, and i don't think there is much sense in doing so. at least i don't think i would enjoy it, and the ui and controls are the biggest issues here imho.
No chance. Teleport would be funky, aiming spells would be hard, and even opening doors would be impossible. Diablo is a game that could only be played on computer since it's a point and click game, and PSPs can't have point and click, and if you think otherwise, then you have problems.
It is cool to play it on small devices like that, I got it run nicely on the OQO www.oqo.com until I sold it, (for as cool as it looks, the keyboard blows - what a waste of cash). Ah but now they have the new cost efficient new UPMC's such as the Acer 10" Aspire http://news.cnet.com/8301-17938_105-10107921-1.html so if it's not a PS2, there are some new ways to take your not too resource intense games with you.