I got the touchpad and broadcom chip working.
Especially the broadcom chip drove me crazy
This site helped me:
http://bbs.archbang.org/viewtopic.php?id=5071
i needed to install yaourt (that's pretty handy btw) and finally it worked.
i already tried to install blackarch, but on the end I got an error message. will try that again.
I know there is a arch forum, but i looked for my broadcom problem on it and I couldn't find it. There were so many hits on the search "broadcom wl", it was quite impossible to find my solution there.
Since there is a growing ARCH user base on Evilzone:
Maybe there can be a topic here with tips for the newbies (like me), or we can further use this topic? It's only a suggestion.