I came across the following message at the website www.eringobragh.net:

For every $1 you donate to The Erin Go Bragh Foundation, we will give you 20 American Airlines Aadvantage miles. This is a great way to accumulate miles, or just fill out miles if you are trying to get that free trip. We will honor any amount to a minimum of $1; for instance if you need 480 miles to round out a free ticket, feel free to send us $24. The best part is, since the IRS considers the cash value of frequent flyer miles to be 2 cents per mile, 60% of your donation is tax-deductible. For example, a $5 donation will get you 100 miles and a $3 tax deduction, a $100 donation will get you 2000 miles and a $60 deduction!

This is legit! What a great way to get those last few miles.