i've got a house in Whiterun, and would like to purchase the house in Solitude but i don't think i'd want to shell out the coin if my stuff isn't accessible from both houses. What I mean is, if i put something or take something from one house, will it appear or dissapear from the other house?

No, your stuff will only be accessible from one house.

They're different houses, all your stuff from your original house will stay in that house unless you move it.

I'm not sure how this would work (though I haven't bought a second house yet). I'm thinking that placement of items such as decorations would be impossible to transfer due to geometrical differences.

no, separate storage sites. other house might grant greater benefits though (extra storage/enchanting table etc)

If you're asking if you can have a Diablo-esque chest that's accessible from everywhere, the answer is no. You have to manually move your stuff from house to house.

it's not the jetsons, you don't have plastic tubes to send things across Skyrim

damn, that svcks. I only use houses for storage. well, thanks anyway.

maybe he thinks his house is like the Doctor's Tardis or apartment 10 in http://www.youtube.com/watch?v=lhAGrJW2Tos miniseries...(If you haven't seen that, you gotta!)

Dont be cheap and buy all the stuff!

Cheers

No, you'll need to move it all manualy.