Call of Cthulhu Film
For those that don't know, in 2005, the HPLHS made a low budget black and white, silent film called The Call of Cthulhu. Its 47 minutes long and stay on line with the plot of HPL's famous story.
The film is worth seeing for HPL fans, but do not expect anything spectaular. It is the "best" adaptation of a Lovecraft story, but considereing the rest of the trash that has been made that is not saying too much. 
The movie is filmed digitially which takes away from the idea that it could have been filmed in the 1920s when the story takes place (something the filmmakers say they wanted to accomplish). Also with the low budget, the actors aren't great, and some of the special effects are pretty bad (dream sequences, ocean scenes and Island).
If you want to see Cthulthu...you won't be disappointed. This is the only version of media (even the game he did not make an appearance) where Cthulthu actually appears. Now remember, low budget. They used claymiation and stop motion animation to film his sequences, and while its decent I've seen far better from Ardmann Animations back in the 90s before they were made famous (in the US at least) by Wallace and Gromit and Creature Comforts.
So, yes, its worth it. I enjoyed the 47 minutes that I spent watching it last night. There are some bad moments (like I never felt scared or terrified like when you read Lovecraft's works), but if you keep in mind that they were working with about a $50k budget you'll understand some of the problems with the film.
And look for the "warning" at the beginning. Kind of funny.
Major K
"He guards the sleep of his pauper master as if he were a Prince." George Graham Vest
"We are alone, absolutely alone on this chance planet: and, amid all the forms of life that surround us, not one, excepting the dog, has made an alliance with us." - Maurice Maeterlinck