considered it but then found out the costs. Around 1,000 to start and then a couple hundred a year. If I have kids I am going to donate it (free) to a collective bank and if something were to happen and no one else had taken it, it would be in the national bank.
We donated ours to the U of I medical school in town when our son was born.
My understanding (explained by several doctors) is that banking cord blood is a scheme, by the time you were to ever need it, more than likely scientific advances will have taken place to allow use of non-personally genetic stem cells. Actually, this is already very close to fruition.