Will sludge be a trendy thing? Who the fuck care as long as every different band can bring something new to the genre and not just copying what is popular. Check out this awesome doom/sludge band from Australia who called themselves Whitehorse. If you dig bands like Corrupted and Khanate, you should also be enjoying this band. Go to the band's website and check out the mp3. It is worth the wait for the download to complete (it is 20 minutes long...).