The g spot has been female sexual anatomy's cause celebre for several years, and interest in the g spot shows no signs of slowing down. Given the number of g spot articles in women's magazines, videos on how to find your g spot, and books about the g spot, its hard to know whether interest in the g spot is coming directly from people who want to explore other sexual experiences, or from a variety of industries that make money off sexual trends.
While other parts of female sexual anatomy, like the internal clitoral body, may eventually bare much more interesting fruit from further research, because of the intense interest on the g spot, it is worth getting some basic information, and resources that can help you find answers that are right for you.
The g spot was named for the German physician Ernst Grafenberg who first described "an erotic zone located on the anterior wall of the vagina along the course of the urethra that would swell during sexual stimulation." By all non-medical accounts the g spot is just that. It isn't a specific spot as much as it is an area that responds to stimulation. There are a variety of different theories as to what the g spot is and why it might feel good.
There are hundreds of sex toys designed and marketed as g spot vibrators or g spot dildos. Most sex toys that are safe for penetration, and firm enough that they wont bend when inserted into the vagina, can be used for g spot stimulation. Whenever a sex toy is hyped, like a toy designed to stimulate the g spot, people might imagine something akin to a heat seeking missile that will search and satisfy on its own (I wish!). In reality g spot sex toys can be fun, and they can make stimulating the g spot easier, but they are only as creative and functional as the people using them.