As ever eruptions blog has provided information and will likely give regular updates on the eruption. I highly recommend taking a look at the Russian website for Kamchatkan activity (KVERT) where there is a nice overview of various volcanoes not just Plosky Tolbachik (here I link to Plosky Tolbachik). By looking at the following link on the same website, you can see images of the summit area taken at different times over the past few years. The most recent was taken during August 2012 and I note the visible absence of steam from the volcano. Suggesting (tentatively) that at this stage there may have been no evidence of a reawakening at the summit.
Personally I find the volcanoes of Kamchatka fascinating and it will be thoroughly interesting to see how this eruption develops over the coming months and potentially longer.