The MIT faculty has a adopted a policy that mandates open access to their scholarly publications. This follows similar moves by Harvard and Stanford (via).
Starting in 2009, the journal RNA Biology will require that authors submitting to their RNA Families section also submit a Wikipedia page summarizing the work. Both will be peer reviewed. For example, Jones, et al. RNA Biology 6, 1-4 (2009) has a corresponding Wikipedia page SmY RNA (via).
The on-line Journal of Chemical Physics has a “Blog this Article” button, for example: