[v@vonunov ~/perl]$ cat infile.txt 
http://everything2.com/user/ameriwire/writeups

[v@vonunov ~/perl]$ ./get-wus.pl infile.txt outfile.txt
http://everything2.com/user/ameriwire/writeups/diverticulosis
Wrote to outfile.txt
http://everything2.com/user/ameriwire/writeups/W.+Mark+Felt
Wrote to outfile.txt
http://everything2.com/user/ameriwire/writeups/moral+law
Wrote to outfile.txt
http://everything2.com/user/ameriwire/writeups/altruism
Wrote to outfile.txt

[etc.]

[v@vonunov ~/perl]$ head outfile.txt 
http://everything2.com/user/ameriwire/writeups/diverticulosis
http://everything2.com/user/ameriwire/writeups/W.+Mark+Felt
http://everything2.com/user/ameriwire/writeups/moral+law
http://everything2.com/user/ameriwire/writeups/altruism