challenges

The number of West Bank barriers (roadblocks, checkpoints, and other obstacles) has increased nearly 70% in the last three years, and now exceeds 625 -- this in a land about the size of Delaware. (Sandy Tolan, Mitchell's Challenge: After Gaza, Five Questions about Palestinian and Israeli Realities, 2009).
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Please read Eva Bartlett's blog , too, and also view these pictures below of just how much destruction there is in Gaza which come from another Gaza blog, Tales to Tell. The pictures are from the post Temporary shelters in Jabalia , but the whole blog contains straightforward, but humane, stories of the people in Gaza at the moment. If you skip everything else in this post, read those two blogs just mentioned.

Jabalia is a refugee camp. This is what it used to look like in 2006. In view of all the destruction, This decision by the BBC and Sky TV (Murdoch owned) is unfathomable, really (Sky joins BBC on Gaza screening ban, 26 January, 2009, ITN).

As Human Rights Watch has said, and other international bodies:

Even though it withdrew its permanent military forces and settlers in 2005, Israel remains an occupying power in Gaza under international law because it continues to exercise effective day-to-day control over important aspects of Gazan life. Israel has the obligation to protect its population from rocket attacks from Gaza, but it also must ensure the safety and well-being of the Gazan population under its occupation (January 22, 2008).

These two places are pretty close to each other. I imagine the contrast between the day to day running of each place is pretty stark and severe. In the West Bank, that is further explored by Sandy Tolan's opening article.
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Lastly, an interesting article on destruction of production capability in Gaza (An assault on the peace process, Donald Macintyre, The Independent, 26 January, 2009).