For general tips and how-to questions, use the @link["https://github.com/mbutterick/pollen-users/issues"]{pollen-users discussion group} (on GitHub). I'll also use that list to post major changes and new features.
You need a GitHub account to post. If you don't have one, don't panic —they're free and easy to set up with an email address. @link["https://github.com/mbutterick/pollen-users"]{Instructions here}.
(BTW, the former ``pollenpub'' Google Group is now deprecated.)
@link["https://github.com/appliedsciencestudio/talks/tree/master/mxnet"]{Polllen as a front end for Reveal.js} by Dave Liepmann. Reveal.js is a library that allows you to create slide presentations in pure HTML/CSS that run in the browser.
Yes, the source for @link["http://typographyforlawyers.com/"]{Typography for Lawyers} is available. In terms of content, TFL was originally the basis of Practical Typography. But in terms of code, this new TFL website is essentially a clone of Practical Typography, but rewritten to be clearer and more instructive, with extensive source comments. [@link["https://github.com/mbutterick/pollen-tfl"]{source}]
@link["https://thelocalyarn.com/excursus/secretary"]{Secretary of Foreign Relations} by Joel Dueck [@link["https://github.com/otherjoel/try-pollen"]{source}]
@link["https://youtu.be/20GGVNBykaw"]{The World's Most Dangerous Racket Programmer} and @link["https://youtu.be/IMz09jYOgoc"]{Like a Blind Squirrel in a Ferrari}: short talks about Pollen that I gave at RacketCons 2013 and 2014, respectively.