Thanks for the replies. Here is an updated snippet:

#!/usr/bin/perl
print "Enter the <dir> where the mp3's are found: ";
chomp ($dir = <stdin>);

chdir($dir) or die "Canot change $dir :$!\n";
opendir(DIR, $dir) or die "Cannot open $dir:$!\n"; 
@songs = readdir(DIR); 
closedir(DIR);
@songs=grep(/(.mp3)|(.MP3)|(.mP3)|(.Mp3)/,@songs);

foreach(@songs)
{
    @id = id3check($_);
    if($id[0] && $id[1])
    {
        rename $_,"$id[0] - $id[1].mp3";
        print "$id[0] - $id[1].mp3\n";
    }
    elsif($_ =~ m/(\s*[^-]*)-\s*([^.]*).mp3/i)
    {
        my @id;
        $id[0] = $1;
        $id[1] = $2;
        s/\s*$|{|}//g for ($id[0], $id[1]);
        rename $_,"$id[0] - $id[1].mp3";
        print "$id[0] - $id[1]\n";
    }
    else
    {
        print "Could not rename $_\n";
    }
}
sub id3check
{
    if (open(FILE, '+<' . $_[0]))
    {
        my @id;
        binmode FILE;
        seek FILE,-128,2;
        read FILE,$tag,3;
        if($tag eq "TAG")
        {    
            read FILE,$id[0],30;
            read FILE,$id[1],30;
             s/\s*$|{|}//g for ($id[0],$id[1]);
             return @id;    
        }    

    }
}
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