Has anyone tried this? The tampon is supposed to alleviate period pain through low-frequency vibrations.

A small company in Montana came up with the idea and patented it under the name "Vipon". A Swiss company purchased the patent and re-named it "Tamia".
This tampon is equipped with a small engine producing a gentle, low-frequency vibration in the area affec- ted by the pain, which has an antispas- modic and pain-relieving effect.
Once menstrual pain or cramps begin, the Tamia tampon, with its outer layer made of viscose, is inserted into the vagina and placed like a conventional tampon. Correct positioning is reached, once the tampon can no longer be felt. The vibration treatment is initiated by pressing the switch on button at the end of a wire and it lasts for one hour, after which the vibration will automatically stop and Tamia can be disposed of. One single Tamia tampon per menstruation is sufficient for the vast majority of women to treat the symptoms.
www.tamia.com