Barton George mentioned in another post that he'll summarize the changes in an upcoming blogpost that should appear on http://bartongeorge.net/

for the boradcom triggered kernel panics, there's a fix available:

https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1415880 - at least applying that patch to my distro solved any broadcom related crashes (those where kernel panics where nothing would work anymore, i.e. blinking caps-lock led)

The crashes caused by the touchpad (X segfaults, you're back at login screen) are also solved by a patch:

https://bugs.freedesktop.org/show_bug.cgi?id=88903

With these two (and with a more current distro overall than the default Ubuntu 14) - the system runs completely stable, no crashes during regular use, no crashes related to suspend (to RAM, don't use suspend-to-disk at all)

Except the double-space keyboard problem (when  using the edge of the spacebar), all other problems can be solved by driver updates/new bios (current is A05)

If I understand correctly, the comment on the following bug, from just a few days ago, provides a fix:

https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1415880/comments/43

I'm not sure I understood correctly though so proceed with caution.

I still await "official" instructions. The kernel panics from the WiFi are currently the largest source of frustration, but what do we know about Bluetooth support for the Broadcom card? I gave up and turned BT off in the BIOS, assuming it is never going to work. I also have given up hope of channels 12 and 13 ever working, but is there light at the end of the tunnel now..?

I'm also hopeful that an official configuration guide will be created; those of us who have upgraded kernels etc. might quite like to get back to a supported state.

So I tried the broadcom fix, but the build failed, because I don't think my kernel (3.19) is supported by it. Now my computer doesn't  seem recognize my wireless card at all, as I don't even get a menu to connect to networks now.

iwconfig returns
"lo            no wireless extensions"

Any help would be appreciated, I really don't want to reinstall. I'm on ubuntu 15.04.

Did you do the first set of steps in the linked thread? That is definitely incorrect for your config.

If so, just "un-add" the line from the config file, and re-run the command. This will rebuild the driver without the patch.

More clearly...

* remove the following line from /usr/src/bcmwl-6.30.223.248+bdcom/dkms.conf :
PATCH[7]="0014-null-pointer-crash.patch"

* run: /usr/lib/dkms/common.postinst bcmwl 6.30.223.248+bdcom /usr/share/bcmwl x86_64 $(uname -r)