Yeah, I never thought there was another way besides shah-luh...They should have just kept it as Sara.
As for Tidus...I know that tee-dus is more correct according to Japanese pronunciation, but I usually say tye-dus...they both sound stupid to me though...so I think fits with him.
Also, I always hate pronunciation threads. Doesn't part of Square's site or something have a pronunciation key or some such? I thought I recall something like that...*shrugs*