Not really a chuck it all in and go and be a bum story, but might interest someone:
We moved over here (around Lyon/ Grenoble area)in Oct 2008. My wife is french but had been in the UK for about 14 years. We ummed and ahhed for ages, and finally went when my wife was due to go back to work after having our son, rather than going once I had found work (me = weak link due to language)
My wife got a job,(before we moved) with a french company, and I walked into my boss's office and siad we're moving to France, either we find something that will work, or bye by and I'll look after my son.
It was agreed that I do 3 weeks working form home, and one week in the UK office. Travel to Uk office at my own expense and time. I did this as a slary for a while, but realised that in order to be able to get helathcare rights in France, as I was working in France (even from home) would mean I should be paying French social and taxes etc. So now I'm french slef employed, and my client is my old employer. Works fine so far.
Not going to be for ever, I will work here sooner or later, should help that my wife is i the same sector, so we're learning lots about our industry over here (geotechnical engineering)
Phone call wise, with our SFR/orange internet and internet phone, calls to UK landlines are free and unlimited.