I once knew a guy who had a framed snail-mail letter from Steve Jobs, asking if he'd reconsider his decision to not accept a job offer from Apple. I saw the letter in ~1994, so not sure when it was actually sent. He said he didn't regret the decision at the time as he was a big Sybase DBA expert and didn't figure Apple would be doing much with databases of any sort, much less Sybase.