Rick Hurst, a fellow Bristolian freelancer, who's path I always seem to be crossing (in a good way!) has an interesting post about platform migration and choice, not least for the reasons behind his decision to choose PHP.
I've recently been tasked with choosing the language and platform for a new start-up. Whilst I've pretty much settled on *nix for hosting (cost and freedom being the biggest pros), I've been toying with the language decision for a while
Like Rick, I have a fair number of old applications in ASP which I support, and for a split second I considered using it for this too! It's familiar and if it ain't broken, why fix it?
However, I'm currently leaning towards Zope3 or DJango, due mainly to my exposure, via Plone, to Zope and Python over the last few years.
But .... the sheer amount of help and skills available, locally and internationally, for PHP and it's similarities to ASP, keep giving me second thoughts.