Jasmine was at the Princess Storybook Breakfast in Epcot when we went last May. I know they can't gaurantee characters, but I think she is there frequently. This was a fun breakfast!
We saw her at the castle 3 years ago, but she wasn't there when we went this year. I think since PSB started, she is there more. I think she is a regular at PSB and only appears on occasion at CRT. DD 5 adores her too! We plan to do both breakfasts this year- she thinks she has to eat with the princesses in the castle but wants to eat with Jasmine too. Let's hope we get ps and she is at at least one of them!!!
She was there last May. You also can find her at the Morocco pavilion in EPCOT several times a day. Aladdin also hangs out there and sometimes both of them are there together.