I’ve plotted the results of the RSS Microwave Sounder Unit (MSU) global temperature anomaly data by RSS (Remote Sensing Systems of Santa Rosa, CA).
For April 2008 it has moved a tiny bit higher, with a value of .080°C for a change (∆T) of 0.001°C globally from March.
2008 1 -0.070
2008 2 -0.002
2008 3 0.079
2008 4 0.080
RAW RSS data is available here
Note that there does not appear to be any sustained upwards trend post 1998.
Here is the entire RSS MSU dataset plotted: