Hi DrillCat. In my 11 years living outside the US, I have gained a lot of experience figuring out how to access NU football and hoops games.
It is true that the Watch ESPN app (games on ESPN, ESPN2, ESPNU, ABC, etc.) is blocked when you try to access it from outside the US. However, if you install a VPN on your computer or iPad and set your location to USA, it is enough to fool the app. I use ExpressVPN, which works great. (This will probably cost you under $10 for one month.)
For others who are interested, here is my approach to accessing 'Cats games on other networks from abroad:
BTN - "BTN2Go International" is excellent. I think that it costs about $70 USD per year for access to all content. An additional perk is that BTN2Go International even carries the "BTN Plus" games (a lot of the non-conference basketball games against less opponents) that I believe requires an additional online subscription in the US. Plus, you can pause, rewind and fast-forward the feeds during live broadcasts. I sometimes wake up an hour after a game has started, play the feed from the beginning and then fast-forward through all commercial breaks and halftime--and still catch up with real time by the end of the game (and listen to the live interview with the coach on WGNRadio.com after the game).
Main Network Stations (ABC, CBS, NBC, FOX, etc.) and some main cable stations (ESPN, USA, CNN, MSNBC, Fox News, etc.) - I use a service called USTVNow
http://watch.ustvnow.com/ I have the add-on app installed on my Amazon Fire Stick. I signed up for it in March order to catch the NCAA Tournament games on CBS, TBS and TNT. I expected to unsubscribe right away, but I continue to use it. (It's nice to watch stuff on TV instead of iPad or laptop.)
TBS and TNT - Again, if you set your VPN to USA, you can use your cable TV or DirecTV login to access these stations through their websites. (Useful during the NCAA Tournament.)
Audio Only - I mentioned WGNRadio.com above. I think most people know about this. WNUR.org also has a live feed that you can access from anywhere.
Hope this helps!
Cheers,
backdoorpass