It is kind of odd, even with no Flash, I have no problems watching clips online, somehow the quicktime on the iPhone does some of the stream conversion. And if you need to use Flash for a website, most the websites I visit have a mobile version. I even prefer not having flash on my iPad, no annoying porno or gaming ads on websites (that includes websites like macrumors and even CNN itself)
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I don't use anything because I've not come across a site needing a flash player in at least a year.
Some movie however will use flash as part of the website experience, but I agree most websites today have adapted the fact that people on mobile device won't have flash install (that could be the fact that a good portion of mobile surfing is done on devices that don't have flash)