The strategy was discussed at length in the other, very long I-Bond thread here
https://www.early-retirement.org/forums/f28/the-i-bond-thread-113668.html
But I'll recap:
In Dec 2021, the young wife and I each purchased $10k for our own account.
In Jan 2022, we each purchased $10k for our own account
In Feb 2022, we each purchased $10k as a gift for each other, to be delivered on 1/1/23.
In Mar 2022, we each purchased another $10k gift to be delivered on 1/1/24
In Apr 2022, we each purchased yet another $10k gift to be delivered on 1/1/25.
So a total of $100k for the two of us. For the first six months, each of those bonds will earn at a rate of 7.12%, for the next six months at a rate of 9.62%, for an annual return of 8.54% the first year. Yes, one must consider the 3 month early redemption penalty and the annual limits that cause the last of the gifts to be tied up until 1/1/25, but all-in-all, it is a very substantial return for minimal effort.