Since December 4th, there have been a number of reports (here, here and via email) that TripAdvisor reviews are not showing in Google Places. A quick search of the Maps index shows this in fact to be the case with TripAdvisor reviews not showing on the Places page for any hotel or B&B searched.
Obviously TripAdvisor plays a huge role in the hospitality industry and the syndication of their reviews to Google has a big impact there as well. I received this email from Su at the Inn at Tanglewood Hall in York Harbor, ME.
It is unclear whether we are seeing a bug in Places that is preventing reviews from showing up or whether TripAdvisor and Google are having a disagreement about Google’s right to show them. Both possibilities have their precedence, with 3rd prty reviews coming and going due to both bugs and battles… I have emailed both TripAdvisor and Google for clarification but as of publication had not heard back.