<--- is excited =p
A Soul Reaver 2 PC demo is in the works. It will be coming soon so stay tuned! I do not have a date yet.
In response to your question:
Will the PC demo be readily available on the SR2 website like the SR1 demo was?
I hope so. Chances are very high that the web site is where the demo will be for download, although I do not yet have confirmation of this.
I do not know how big the demo will be, but I will post more info here as I receive it.