[th]strabrahide, you're talking about pipelining the commands, which needs to change the browser's standard settings. That's agains the rules. Period.
Sending a train in less than 150 ms is perfectly valid and also perfectly possible without cheating. Open a blank textfile on your PC, hit two keys alternating for 1 second. Count the chars. As soon as you reach 7 at least, you're redy to send a train in less than 150 ms.
On a sarcastical sidenote: According to your posting, we'll have to think about a rule like "only 1 command per 5 seconds". Because I've heard, there are people with cellphones, playing this game, who cannot send commands faster than that. I don't want you to have any technical advantage over them, just because you have a keyboard and a better connection...[/th]