Awesome.
Keep in mind what sherr posted about matching rules, but you can also consider "frontloading". See the madfientist for discussion. The basic idea is that it's always better to get as much in as fast as possible. The reasons are:
1) More time for compounding.
2) Getting fired or FIRE'd.
When you reach the $17,500, you simply change your withholdings then, or your employer automatically does it for you. Some bloggers have described this strategy as a great thing to do in your final year of regular employment since it might be your last chance to defer that much income.
Either way, very cool, congrats!