Sentinel AUs are fun to play with but I don't think any rise to the level of me thinking they're canon. Except maybe Javert. There was definitely a period where the greater Seacouver-Cascade Twin Cities Metropolitan area was its own thing though!

White Collar and Suits definitely meshed well, and I always kind of thought they were probably also I the same universe as Leverage and Boston Legal, but I never watched enough canon for either one to have real opinions.