Martin,
Personally I'd rather see your time and energy actually being used on inkscape rather than creating fixes to problems we're creating by changing vcs again. I'd also like to avoid custom tools like the plague, as their one more thing to maintain across our multiple platforms or we have different systems in different places.
on the wider discussion:
What do we actually benefit from changing? Half the arguments every time this comes up seem to be little more than 'but thats what everyone else is using now (or switching to)' which makes sod all difference if we arent getting devs who are already well established devs on those other systems. If Git has a horrible learning curve, why would we change to it? Do we honestly believe that the VCS we use is stopping new devs coming to the project? My only real experience of Git was when the svn change history got completely screwed over by svn-git. Personally unless someone can give some clear concise pros and cons of the change, (including what we do for a bug tracker, as I assume we'd have to move from launch pad) with some fairly compelling arguments then I dont really think we should be wasting time or energy having the discussion let alone making a change.
just my 2c (somewhat irrelevant since about all i get time for is reading the list these days!)
Cheers
John