According to today's Sunday Business Post, the Berkeley Court, Jury’s Hotel and Jury’s Towers in Ballsbridge are to be reopened under the D4hotels.com brand.
D4hotels.com was registered on Wednesday, but all the other extensions (.ie, .net, etc.) are still free, as are D4hotel.com, .net, etc. Although I'd be more than happy to act for the owners to try to evict the inevitable cybersquatters and typosquatters, it would be substantially cheaper simply to register the other extensions and variants in the first place.
Update: Well, that was quick. D4hotels.net and D4hotels.org were anonymously registered one day later at GoDaddy.com. D4hotel.com was registered on the same day also.