SEOmoz has launched a new version of the factors that accounts for search engines' ranking algorithms. The new version addresses the current picture and significance of various factors in the algorithms. Thirty five search engine experts have poured in their views and expertise to compile the new version. The previous version was launched in 2005.
An overview of Top 10 Ranking Factors in 2007 via SEOmoz:
1.Keyword Use in Title Tag (4.9)
2.Global Link Popularity of Site (4.5)
3.Anchor Text of Inbound Link (4.4)
4.Link Popularity within the Site's Internal Link Structure (4.1)
5.Age of Site (4)
6.Topical Relevance of Inbound Links to Site (3.9)
7.Link Popularity of Site in Topical Community (3.9)
8.Keyword Use in Body Text (3.9)
9.Global Link Popularity of Linking Site (3.7)
10.Topical Relationship of Linking Page (3.6)
For a detailed analysis and information take a look at the Search Engine ranking factors.