REI has the Brooks B17, but I believe you'd have to order it online - I don't think any stores stock it. I mention this because the Brooks is quite a divisive thing - either you love it, or you hate it. If the B17 doesn't work out for you, REI will make it right.
As for your other questions, I wouldn't run clipless on a hybrid (just my opinion), and I just put them in my pockets, but I just wear cheapo Target polyester shorts (with a padded cycling liner underneath).