On a fresh install of slackware 12.0, curl is currently broken. After I log in over ssl, I run:

 cd /usr/local/src 

followed by:

curl -0 http://ftp.gnu.org/pub/gnu/emacs/emacs-22.1.tar.gz

and receive:

curl: error while loading shared libraries: libidn.so.11: cannot open shared object file: No such file or directory

Any ideas for a fix/workaround? Aside from wget (which is not installed.)

Try Installing/Recompiling libidn:
http://darkstar.ist.utl.pt/slackware/sl ... /l/libidn/

If you have PHP installed... set up a little upload form.
Can't think of much else other than that.

You can install the libidn package from the slackware distro:

root@liX-X:/srv/slackware/slackware-12.0/install/slackware# curl
curl: error while loading shared libraries: libidn.so.11: cannot open shared object file: No such file or directory

root@liX-X:/srv/slackware/slackware-12.0/install/slackware# installpkg l/libidn-0.6.10-i486-1.tgz
Installing package libidn-0.6.10-i486-1 ([recommended])...
PACKAGE DESCRIPTION:
libidn: libidn (GNU Internationalized Domain Name library)
libidn:
libidn: GNU Libidn is an implementation of the Stringprep, Punycode and IDNA
libidn: specifications defined by the IETF Internationalized Domain Names
libidn: (IDN) working group, used for internationalized domain names.
libidn:
Executing install script for libidn-0.6.10-i486-1...

root@liX-X:/srv/slackware/slackware-12.0/install/slackware# curl
curl: try 'curl --help' or 'curl --manual' for more information