I thought what was on the site was written, too. Unless there is some other form of medium I am not aware of.
Also, it isn't. It describes locations of tokens, emblems, and eggs, as well as imput codes for previous versions of SRB2 and unlockables. I didn't make all of this up; I merely compiled whatever I gathered from the message boards, as well as a bit of knowledge I already had about some of the secrets, and put them in one walkthrough file. It's just a matter of convenience.
If you don't like it, fine, but there are some things this walkthrough covers that the site doesn't, and vice-versa.