Best WiFi hotspots in Boston?

I'm looking to expand my roster of WiFi hotspots. What are some of your favorite places in Boston? For me, access to an outlet is a necessity, as my laptop battery doesn't work. I also place high value on availability of hazelnut coffee and top flight bathrooms.

Recently I've been kicking it at the Washington St. Borders but today was a rough one - slow network, panhandlers, one of those guys who announces his every action to nobody in particular but everybody in general, playing of crappy music at max volume out of laptop speakers so the entire mezzanine can hear, singing Christmas carols (all the same guy), and an endless wave of unconscionable, nauseating BO.

I need a strong second option.