I took a look at some Alexa stats on Pownce, Twitter and Jaiku and Pownce has really jumped in terms of reach and traffic since its launch. I wonder how much of that is due to the Digg effect (if any). I did notice that Twitter has also gained more traction while Jaiku has remained pretty constant for the last few months.
I would really like to see Jaiku pick up more traffic. It is more flexible than Twitter and has some features lacking in both Twitter and Pownce and yet it isn't the preferred microblogging service. Why is that? Is it because of Jaiku's European origins?