I haven't tried the code either, but I may have found some improvements (based on the original code):

$/=$_;($,,$a,$c,@_)=@_;$k{$c}=$w=$a;socket S,2,1,6;bind S,&a;for(liste
+n
S,5;$SIG{ALRM}=i;m! (\S+) ([e-i])(.*?)/!s&&($k{$w=$1}=$`eq$,)&&&$2){al
+arm
9;(accept(C,S),alarm 0)?read C,$_,1e6:($_="$, $a f".shift)}sub i{}sub 
+t{socket
C,2,1,6;$k{$w}&&=connect(C,&a)&&print C"$, ".pop;close C}sub h{t"$_ i/
+"for
keys k}sub a{$w=~/:/;pack'CxnC4x8',2,$',split'\.',$`}sub f{$w=$_,t"$1 
+$3/"for
keys k}sub e{open C,'>',$3;print C $'}sub g{open(C,'<',$3)&&t"$a e$3/"
+.<C>;&h}
[download]

which is 10 bytes shorter. Again, I haven't tested it, but most of it should work... I hope.

Why is the match in line 2 done with m!..!s? In the original code, there is no '.', so the s modifier is useless. It may be necessary in my code, however.

Eugene