>>On MS Downloads site I only found this http://www.microsoft.com/downloads/details.aspx?FamilyID=fa751db3-7685-471b-ac31-f1b150422462&DisplayLang=en by searching SQL Server 2005 SP 3
>>
>>(I started my check from Sergey's site, but he doesn't list SP3 for SQL Server 2005 either).
>
>So, the best way to update to that version would probably be by waiting for new MSDN DVD's. Is that how those having that running obtained it?

I amended my reply a second go, please re-read. Looks like there is only SP2 for MS SQL Server 2005 and you should get it. Get it from
http://www.microsoft.com/downloads/details.aspx?FamilyID=d07219b2-1e23-49c8-8f0c-63fa18f26d3a&DisplayLang=en