On January 14, R. Vivian Acosta, Ph.D. and Linda Jean Carpenter, Ph.D., J.D. published their ongoing study, "Women in Intercollegiate Sport: A Longitudinal, National Study , Thirty-One Year Update." Says the introduction:

Among many other things, the 2008 data show the highest ever participation by women in our nation's intercollegiate athletics programs. On the other hand, the data also continue to show a depressed representation of women as head coaches both of women's teams and of men's teams.

Among the administrative ranks however, more females (both as a percentage and as an absolute number) serve as athletics directors than at any time since the mid 1970s.

You can download a PDF of the full report here. Some key highlights:

• Highest ever number of women’s teams: 9101 teams, 8.65 per school.
• 42.8% of women’s teams are coached by a female head coach. (v 90% in 1972)
• 21.3% of athletics directors are females. This represents a significant increase from 18.6% in 2006. (v. 90% in 1972)
  

In the Commentary section, they note the impact of female administrators on the presence of female coaching (which harkens back to Dr. Brand's called attention to the lack of women and minorities in head coaching and athletic director positions.)

In Division I programs with no female administrator at any level, 30.6% of the coaches of women's teams are females compared to 43.9% in program with a male AD but also having at least one female serving as an assistant or associate AD. The percentage of female coaches increases even more when the AD is a female (50% female coaches of women's teams in Division I).