I know this is a UK store, but here’s a list of all the fujifilm wide angle “adapters” for the finepix lineup
http://www.twenga.co.uk/dir-Photo,Lenses-and-filters,Wide-angle-converter-lens-89
Just know, the higher the price, most likely the better, the cheaper ones probably have horrible glass and for sure give bad choma and chromatic aberrations and all sorts of great stuff.
the lower the mm, yes the wider the view.
The problem is, P&S cameras will never see true wide angles, unless you want to pay a hefty price and do a conversion and make it use SLR lenses, which in the end probably wouldn’t be worth it, as you’d have a great piece of glass and a horrible sensor.
I just got a 10–20mm (15–35mm in 35mm film) lens for my Nikon D40 and it’s great, it provides a 102 to 68 degree view, which is fairly darn wide (not sure if this link will work: http://photos-039.ll.facebook.com/photos-ll-snc1/v263/173/57/1127310039/n1127310039_113542_1211.jpg)
Just know, when you go that wide (which is almost as wide as you can go except for the true fisheyes which are like the 8.5mm lens which is over 180 degree view), the sides and corners get not so pretty. My Sigma lens, no complaints about it so far, it’s insanely sharp in the center, and ridiculously sharp all over at 20mm.