[lsiebert]

Talk to your customers. Make sure they can export their data. Free customers too. Consider talking to the archive team if appropriate.

Wipe any hashed passwords.

Sell the code, or open source if you can't find a buyer in two months.

Write up what happened.

[iworkforthem]

I like the write about what happened & open source the codes! Customers I guess will seek out other alternatives solutions.