A few months ago, rheumatologists Dr. Hasan Yazici (in Turkey, considered the world's expert in Behcet's) and his son Dr. Yusuf Yazici (runs the Behcet's Disease Clinic in New York City) taped an interview between themselves discussing Behcet's Disease and its current treatment.
The YouTube tape is a bit long and slow, but I wanted to mention their discussion of the limits of colchicine at minute 24:46 on the YouTube tape. Dr. H. Yazici states he wishes that other doctors would not choose colchicine as a first-line treatment for Behcet's patients, with some caveats.
While the Yazici's describe a number of medications, they do not mention some other potentially useful treatments that I know they've prescribed (from personal conversations and emails with them), possibly because of the lack of extensive research into them. For example, I know that they've prescribed Trental (pentoxifylline) and nicotine patches, but they don't mention those in this interview or their published articles.
Still, other Behcet's specialists continue to promote the usefulness of colchicine, such as Dr. Davatchi in Iran along with authors of many general articles about Behcet's. Even in a recent BD research article with Dr. Yazici listed as a supervising author, colchicine is identified as a common treatment.
It's important to keep in mind that there are quite a few different treatments for Behcet's symptoms and many differences between doctors (and countries) on prescribing patterns.