Today Covalent Technologies (the guys who provide commercial support for all things Apache) was acquired by SpringSource.  So after Sun acquires the "M" in LAMP Spring buys the "A".  Since the "L" is distributed among many companies and the "P" is not really something you can buy, it looks like the LAMP stack is now all locked up.  This is a maturing step for Open Source.  As more and more people use open source, the inevitable questions are "how can I get support" and "where do I go to download a fully integrated stack from a trusted source".  As the components of LAMP move into commercial companies that can provide the level of support that enterprises are looking for, open source becomes a more viable alternative to closed source.  Sun already provides support for the SAMP stack and with the acquisition of MySQL look for those support offerings to be even more robust.