I found this link which seems to suggest that Prodrive and Epsilon will both have entries excepted for the 2010 grid which would put the number of teams up to 28. Perhaps one entry is being lined up to replace BMW but the second team would require a non-qualifier each race weekend. I can't see that happening. So is a another new entry being brought in as cover for Renault?
http://formula-1.updatesport.com/news/a ... /view.html
http://formula-1.updatesport.com/news/a ... /view.html