I've just booked my flights and hotel with Great Escapes. We've used them before for holidays in France, but this is the first time that I have used them for city breaks.
I will be staying at the Mercure Imlauer Nestroy Wien, the main criteria being location (with regards the venue), price and Internet access >:)
Looking forward to moderating the POE Hackathon with a mixture of excitement and trepidation.