One of the most interesting discussions at ThatCamp Philly was the one on lowering barriers to sharing digital humanities content. This was a very wide ranging discussion as seen by my notes below.

Lot of discussion of internal conflicts over being "open"
Some discussion of accessibility issues with flash.
Different populations use different devices. If you have high school students with smart phones, you need your stuff to work for them.
I chose PBWorks for my class wikis because of how nice the look on phones/tablets.
Tenure committees are more impressed by new stuff than continuing work on old stuff.
Have to get over fear of sharing.