Just buil a new RPM file for rlwrap 0.26 for Centos 4, Redhat 4 and Oracle Unbreakable Linux. I've added my (very) basic sqlplus auto complete file.
If you are not familiar with rlwrap but use Oracle on Linux/Unix you should definatly have a look. rlwrap provides basic "bash style" command line editing in sqlplus (and other command line tools), you get command history with working arrow keys and normal command line editing.
Download 32-bit version: rlwrap-hali-0.26-1.i386.rpm
Download 64-bit version: rlwrap-hali-0.26-1.x86_64.rpm