Displaying a Featured sentence for each post

Since there’s most likely not a good way of having WordPress automatically pick out the featured sentences for you–which means you’ll be doing that by hand–why not just enclose the particular sentence in an XHTML tag such as

<span class="pullquote">"Fancy sentence here"</span>

And then style it accordingly in the CSS?

There is also a plugin for it:
https://www.ads-software.com/support/topic/88688?replies=25
but the author’s site is down ??