Mwclient 0.6.0 was released in February 2008. This was the first official release via Sourceforge. This version removed some Pywikipedia influences added in 0.4.
0.5
which accomplished easy extendability and added proper support for continuations.
0.4
and shows the current module architecture. It was influenced by Pywikipedia, which was discovered by the author at the time.
0.3
0.2
and maybe already used the API for some part, but details are unknown.
0.1
Mwclient 0.1 was a non-API module for accessing Wikipedia using an XML parser.