I think it's a great idea too. I used to run as an alternative for when I didn't have enough time to ride. I was off for about 7 years and started back up this year. There are times it hurts but there are also times when it all comes together and is great! I agree to get shoes that work/fit for you. Going somewhere good, ie a place where a part-time high school student isn't trying to fit you, is a good thing. I went to a place that fit me into (due to really ugly feet) mens shoes with extra width. After getting those shoes and double-layer socks, it was the first time ever I didn't have blisters.

I think it will be a perfect cross-training activity. I always remember an endurance athlete I used to work with talk to me about her exploits. She would do these 100 mile trail runs...she was so great Anyway, she said running can double as cycling training but cycling training doesn't work for running. She could not ride for ages but due to all her running she was very strong on the bike.