Still waiting on a Neuromancer film or better yet, a mini-series.
I've always been a big fan of Gibson penned Johnny Mnemonic, which, if you can get past the bad acting and wooden dialogue, has plenty of trademark Gibson cyberpunk tropes.
With Christopher Walken, no less--it's one of my favorite obscure gems of the cyberpunk film genre.
[1] http://www.williamgibsonbooks.com/blog/2003_01_01_archive.as...
That said, the Shadowrun universe is certainly an interesting mashup of magic and technology, and the fact that it exists outside of a particular story or stories seems like it would lend itself to interpretation and exploration beyond that of an adaptation of a static tale.