Their most recent news was in July, something about skin care though.
http://www.histogeninc.com/aboutus/news_events.htm#58
Srsly they were very promising...
http://www.histogeninc.com/applications/hsc.htm
Clinical Development
Two proof-of-concept clinical trials of an earlier prototype of CCM were completed outside the US, revealing promising efficacy results. In one trial, 84.6% of patients receiving just one treatment showed a significant increase in terminal hair count and hair thickness at 12 weeks. Improvement of hair growth parameters was still evident after one year.
In the second clinical trial, in which patients received two treatments 6 weeks apart, the increase in total hair count was 46.5% above that seen after a single treatment. Significant improvements were observed in total hair count, terminal hairs and hair thickness at 12 weeks. At one year, hair growth parameters remain substantially above baseline.