VMWare ESXi update mapped to release numbers

Update to the following:
I found the holy grail of patch/update #'s to build #'s


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Hi Internet Audience,

Perhaps this will save someone a bit of pain in trying to interpret compatibility guides when upgrading ESXi hosts (which is in my near future, and will expound upon posthumously.

Kindly LMK if you have other build #'s to map to Update or Original releases of ESXi and I will add them here.  Corrections also welcome, as well please share if you find a link to this sort of table on VMWare.   

ESXi version ... Update # ... Build # (as seen on the hypervisor or vCenter) & release date

4.0.0 ... Original ... 164009 2009-05-21
4.0.0 ... Pre U1 ... 171294 ???
4.0.0 ... U1 ... 208167 2009-11-19

4.1.0 ... Original (AFAIK) ...  260427
4.1.0 ... U1 ...341836 2011-02-10
4.1.0 ... U2 ... 502767 2011-10-27
4.1.0 ... U3 ... 800380 2012-08-30

5.0.0 ... Original ... 469512 2011-08-24
5.0.0 ... U1 ... 623860  2012-03-15
5.0.0 ... U1a ... 755629 2012-07-12 Release Notes

And most recently:
5.1.0 ... Original ... 799733 2012-09-10

Caveat emptor!  I make no promises that this info is 100% accurate, but it should be darn close.