The 5.12% Savings Account
⚠ WELL THAT SUCKS ⚠
The week after I posted this, the Mango Money sign-up page was deactivated!
The week after that, Union Plus sign-up page was also removed.
In August, the Mango Money signup page was back, but the terms have changed:
the savings account interest rate is 6% only with a $500+/month direct deposit.
Otherwise, the interest rate is only 2%.

One thing we discussed was the pain of holding cash in "high-yield" savings accounts that return, at best, 1% now. I used the opportunity to pitch US Treasury Series I Bonds, which I've always liked for emergency funds because they at least keep pace with inflation. Another attendee recently became financially independent (dunno if he wants to be publicly outed and not sure if he has a site) and had a more liquid solution with a better rate: a savings account associated with a prepaid debit card company called Mango Money.
The vital details, culled from the AHS Wiki page that serves as my open notebook for these projects:

