One thing to consider is memory cards...I know that Sony uses memory sticks which only work with Sony products. That's really cool if you have or are planning to get newer Sony things.
Most, (I think) other cameras use flash cards...which are manufactured by many companys and therfore can be found at good prices. They are getting bigger (memory wise) all the time.
There are card readers, camera ports and such.
If there is anything the nonconformist hates worse than a conformist, it's another nonconformist who doesn't conform to the prevailing standard of nonconformity.