I guess the average person assumes that a higher version number implies a 'better' (define your own interpretation) product. Seems Google is joining that particular use of version numbers as marketing. And to be honest, to some degree I can completely understand this. Imagine having to explain why Internet Explorer 6 is not a better product than Firefox 3....

As a developer I always find it hard versioning my work. Why do I consider it to be a 0.8 and not 1.0? Why would you consider it 1.0 and not 0.8? I try to stick to the following rule of thumb:

a.b.c

a) Major changes or multiple big new features b) Medium changes, maybe one or twee new small features c) Improvements

I'm curious as to what 'system' other people use to determine their software's version numbering.