A number of recent blog posts appear to have picked up some interest:

My Raspberry Pi Thinks It's a Mainframe

IBM 4381 CPU and Raspberry Pi

A post about how a Raspberry Pi can be used to emulate an IBM 4381 mainframe processor. This had around 72,000 views in 24 hours, reaching over 100,000 after a month.

A Raspberry Pi (VAX) Cluster

Raspberry Pi and terminal

Using a Raspberry Pi to emulate a classic computer architecture again, but this time a pair of VAX that are running OpenVMS and configured as a cluster. This received around 30,000 views in the first 24 hours.

Atomic Time for the Raspberry Pi

Raspberry Pi and MSF receiver

A post about how you can synchronise a Raspberry Pi to the time service provided by the UK's National Physical Laboratory, this apparently caused a bit of excitement at NPL and resulted in a news item that was featured on their homepage.