What is your opinion about internation business law at Georgetown? What do you know about teachers, courses, program, international students...? thanks!

Since no one else replied, I'll try to provide some basic info with the disclaimer and warning that: I haven't attended Georgetown, and as much as I try to remain objective, I'm probably biased due to personal connections and family ties.
I hope an actual alumni will give you more/better feedback.

1. Programs: two in particular might be of interest to you: the Institute of International Economic Law WTO certificate and the International Business and Economic Law LL.M.
The latter is a very recent program, introduced in Fall 2008 if I'm not mistaken, and apparently rather small/selective: only 21 foreign students were admitted and 16 chose to attend according to the Georgetown december 2008 LL.M newsletter.

2. Teachers: several very well known and respected in this field: Prof. Salop, Langevoort, Jackson, etc. And exciting new hires for 2009 such as Professor Shelanski from Berkeley (teaches comparative EU/US antitrust law among other things)

3. Courses: one of the largest offering in the US. Courses such as International Business Transactions and International Project Finance and Investment might be interesting for you.

4. International students: what would you like to know? Class size? More than half of all students enrolled in LL.M at Georgetown are domestic (or have a US JD) which is very unusual for a US LL.M. There are actually fewer international students than at NYU, Columbia, and possibly Northwestern as well: between 180 and 190.

Hope it helps.