Science Daily today has article previously referenced here on nasal delivery
"In this groundbreaking study, mesenchymal stem cells (MSCs) delivered via the nose preferentially migrated to the brain and were able to survive for at least 6 months. Substantial improvement in motor function -- up to 68% of normal -- was reported in the MSC-treated rat model of Parkinson disease."
[URL="http://www.sciencedaily.com/releases/2011/02/110208163504.htm"]
Such great news