Two of the speakers at DeveloperDeveloperDeveloper are Australian, and they both pronounce "data" to rhyme with "garter" as opposed to "later". Before jumping to conclusions, I asked the only other Australian techie I know how she pronounced it, and she also rhymes with garter, confirming my theory.

Whilst on pronunciation, I noted a new TLA to extend my list:

WMI is pronounced "Wimmi".

I think I might start my own. From now on, TLA (three letter acronym) shall be pronounced "Te-Lah".