Documentary on the history of the 808, complete with a great soundtrack and interview with the inventor:

808themovie.com/

And all kinds of electronic music. 909 and 303 are heavily used in techno and house.

And before that, electronica - 808 State et al.

As I understand it, in most productions these days, "808 type sounds" often tend to either be sampled (and manipulated), or synthesized from something else.

In other words, whether Kanye had access to an original 808 or not, the Akai MPC you see in the picture probably also played a prominent role. :) I also understand Kanye's big on using an old Ensoniq ASR-10 for sampling duties.