Windows SharePoint Services V3 and Microsoft Office SharePoint Server 2007 are now be able to get updated to the latest available bits with April CU.

KB articles: available later than this post

WSS:

981043 The full server package for WSS
http://support.microsoft.com/default.aspx?scid=kb;EN-US;981043

MOSS:

981042 The full server package for MOSS
http://support.microsoft.com/default.aspx?scid=kb;EN-US;981042

Download and installation information:

• Install SP2 for WSS and MOSS SP2 and Language Packs if not yet happened.
• Do you need more information about the SP2 update? Please check out the blog of my colleague Steve Chen http://blogs.technet.com/steve_chen/archive/2010/04/22/all-about-updating-wssv3-and-moss2007.aspx
• Install the full server package for WSS http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=981043&kbln=en-us
• Install the full server package for MOSS http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=981042&kbln=en-us

After applying the preceding updates, run the SharePoint Products and Technologies Configuration Wizard or “psconfig –cmd upgrade –inplace b2b -wait” in command line. This needs to be done on every server in the farm with SharePoint installed.