H.P. Lovecraft Wiki
For no particular reason I decided to pair his most infamous Old One with Vampirilla, Daughter of Drakulon :-)
If you ever get a chance, check out the sit of the H.P. Lovecraft Historical Society: http://www.cthulhulives.org/
They have made a couple of excellent films based on Lovecraft's stories: a 'silent movie' version of "Call of Cthulhu', and a 'talkie' of the "Whisperer in the Darkness".
Also, one of the absolute strangest references I have ever seen to the Cthulhu Mythos is in an anime called Haiyore! Nyaruko-san, in which Nyarlathotep is a cute girl, among other strangeness 0_0: http://en.wikipedia.org/wiki/Haiyore!_Nyaruko-san
Here is an online version of the first episode for those interested: Episode One