Germany: search works, Israil shows up in the TT list. This all seems to be very inconsistent, looks more like a technical problem.
Testing it from the states (LA) and the middle east (jordan) and it's definitely blocked. And it's not just #flotilla, also israil and other tags related to the topic are being blocked. Israil shows up in the TT list, but the search doesn't work. The rest are completely hidden from TT as well.
Yup, I'm also in Los Angeles area and a search for #flotilla gets no results, not even a "No Results" message.