Every year, BioMed Central calculates unofficial impact factors for journals that have published a significant number of research articles but do not yet have an official impact factor. These unofficial impact factors use the same citation data and methodology used by Thomson Scientific's official impact factor calculations.
Newly calculated unofficial 2006 impact factors show a significantly increased citation rate for BioMed Central journals. For example,BMC Biology and BMC Medicine, the flagship journals of the BMC series, both increased their unofficial impact factors significantly. The 2006 unofficial impact factor for BMC Biology is 4.43 (up from 3.81 in 2005) while for BMC Medicine the 2006 figure is 4.17 (up from 2.52 in 2005).
Updated unofficial impact factors for more than 50 journals published by BioMed Central are listed on our Impact Factor FAQ page, alongside details of official impact factors for a further 26 journals.
The open access movement:
Putting peer-reviewed scientific and scholarly literature
on the internet. Making it available free of charge and
free of most copyright and licensing restrictions.
Removing the barriers to serious research.
I recommend the OA tracking project (OATP) as the best way to stay on top of new OA developments. You can read the OATP feed on a blog-like web page or subscribe to it by RSS, email, or Twitter. You can also help build the feed by tagging new developments you encounter.
