2009 isn't still ended but it is just time to glance at it. This is what said in this very interesting article about SEO Industry trends of 2009.

In this article you can also find an interesting look ahead to 2010 including the following point I verified seriously recently:

Page Load times: Google have recently announced that page load times will increasingly become a ranking signal in search results, with the aim of encouraging the general improvement of the WWW experience for the browser.  This has been suspected to be the case for a few years, as Google itself confirmed

here it is other hot themes for 2010 you can find explained in the article:

• Social Search
• NewsGroup dropping Google
• Location based social media
• HTML 5