A4 or Letter
PDF of the day
Starscape is an online application which arranges selected blog entries (currently, Google Reader is supported) as a nicely formatted PDF.
Starscape allows users to select some or all of their 'starred' messages and generate a PDF, easy-to-read and ready for on-screen reading or printing. Choose an appearance for PDF documents: either specially designed view for E-Book readers or a newspaper-like (A4/Letter-sized) layout.