Not to worry. It looks like the script ran without error and you should be okay.
The part about needing ncurses and terminfo was copied over from psptoolchain, which I used as a base for ps3toolchain. They aren't actually needed at present as the toolchain is still very new.
For future reference, you can use synaptic to search for packages with a nice gui, or search on the command line:
$ apt-cache search ncurses | grep dev
lib64ncurses5-dev - Developer's libraries for ncurses (64-bit)
libncurses5-dev - Developer's libraries and docs for ncurses
libncursesw5-dev - Developer's libraries for ncursesw
btscanner - ncurses-based scanner for Bluetooth devices
libaca-dev - The Advanced nCurses API
libaca0 - The Advanced nCurses API -- development files
librote-dev - a simple C library for VT102 terminal emulation - development
libtexttools-dev - Ada and C++ library for writing console applications
You'll find that in ubuntu development packages end in '-dev'. In this case you'd install libncurses5-dev.
1 - Open the makefile in a text editor.
2 - Change 'gcc' to 'ppu-gcc'.
3 - Change 'objcopy' to 'ppu-objcopy'.
4 - Save the makefile.
5 - Grab a book on developing with unix tools.
My machine, running Ubuntu 7.04, can compile a complete PS3 toolchain in 15 minutes or so. I haven't timed it yet.