Not that it's a great replacement, but I've really grown attached to listening to the audio-only streams through the NHL app. I'm pretty sure those aren't blacked out anywhere, and radio is still very entertaining. I especially love the crew in Ottawa and the crazy old man in Pittsburgh.

Of course, there's the whole weird, questionable business model world of hockeystreams.com -- which puts really high quality streams of all sorta of hockey games up live (not just NHL, but I believe AHL and others too), probably proxied in from other places that don't have all of the silly restrictions. Their site isn't much right now, they limit subscriptions and during the season it's all "use" mode and no "sell."