From Bioinformatics.Org Wiki
The front page of Bioinformatics.Org itself is a bioinformatics 'Blog.
The Bio-Web links to resources online for molecular and cell biologists and covers current news in various biological/computational fields.
Genehack is the first bioinformatics 'Blog I ever encountered.
Easybioinfo is a French bioinformatics blog concentrating tips, tutorials and free source code. Articles are posted in French & English.