Anyone done their own grout removal?

I feel very similar. Unfortunately I live with a cold and heartless woman who has no sympathy for my plight. 

Traditional treatment is high doses of NSAIDS or indomethacin to kill the pain, anti-inflammatories, and drugs, such as allopurinol, that inhibit formation of uric acid. Allopurinol, however, has some serious side effects, such as skin eruptions, liver toxicity, inflammation of the blood vessels, and possible weakening of kidney function by forcing the kidneys to work too hard to excrete the uric acid. If you have kidney problems and use this drug, be sure to be carefully monitored. Another drug that is used is colchicine, but it, too, has serious side effects, including numbness in the hands and feet, abdominal pain, nausea, vomiting, weakness, hair loss, and abnormal bleeding or bruising. Cortisone is used for acute attacks, but should not be used for extended periods.

A new gout drug, febuxostat, which is awaiting FDA ap.....oh wait. You said grout, not gout didn't you. nevermind.

To answer you question the Dremel should do the job nicely. Just be careful because if it get away from you grout removal will turn into tile replacement. (that is assuming you are only replacing the grout and not the tile. If you were replacing the tile I would not worry about the grout as a good flat shovel will do the job.)