Here's the steps I followed to get the iFolder client working on Gentoo. (NOTE: you may need to be root for some of these steps to work properly)
1. Download the first 3 rpms listed for SUSE 10 (from ifolder.com):
ifolder
nautilus-ifolder
simias
2. Use rpmtotargz to convert the rpms to standard archives
rpm2targz ifolder3-3.1.5243.1-4.i586.rpm
rpm2targz nautilus-ifolder3-3.1.5243.1-4.i586.rpm
rpm2targz simias-1.1.5242.1-4.i586.rpm
3. Change to your root directory (/, not /root)
cd /
4. Extract the archives you created in step 2
tar xvzpf /home/sbishop/ifolder3-3.1.5243.1-4.i586.tar.gz
tar xvzpf /home/sbishop/nautilus-ifolder3-3.1.5243.1-4.i586.tar.gz
tar xvzpf /home/sbishop/simias-1.1.5242.1-4.i586.tar.gz
5. That's it, now you can run 'ifolder', and logon to your server.