According to this article from icv2.com

• The number of 2007 anime releases are decreasing compared to the previous year’s
  • Anime saw a decline of releases around 20% in 2007
    • This does not include the fall of Geneon in October
• The number of new manga new volumes are continuing to increase
  • In a survey, manga publishers are likely to increase the number of manga volumes published in 2008 by 18%
    • This is after a 35% increase in 2007