@ Heretic - Tarantulas are arachnids and arachnids are invertebrates.(no spine) I love the little sugar gliders. My daughter is always hanging with "the sugar glider guy" at the shows in Chicago.
@ Wildspirit - They are venomous as in they possess venom, but the bite from a tarantula is not "medically significant". In most US species, the bite would be about as painful as a bee sting, but less dangerous... there has never been a documented case (of which I'm aware) of anaphylactic shock from a tarantula bite. Most North American species are quite docile... just in case you ever wanted to pick one up and "snuggle". I'll include a pic of one of my favorites... from India... and no.. the pic has not been altered.
Interesting subject! I was just at a relatives house last night and there was one in his room ... I hate to tell you what happened to it! It wasn't pretty! I did get a picture before it demise ... they "look" kewl ... but, they are still venomous!