I'm not sure i'd personally invest in these companies at present, as party have demonstrated, they seem very susceptable to changing legislation. I guess that could actually in the long term work in a company such as party pokers favour. The govt recently seemed very keen to sell these companies the idea that rather then being based in the likes of costa rica, a base in England would be seen internationally as favourable........
As a former player I always enjoyed Party over every other site.....that's not to say i would invest in them though, the whole poker thing could just be fad, i'd now rather chew my own arm off than sit playing tables for a couple of hours.