You have a few months to experience life in another location and with another culture with few restrictions. Seize the day.
AA has been offering wireless on several SFO <-> JFK flights for quite a while. And as another poster pointed out, Virgin is also offering this on many flights.
The connections from the flights were good enough to watch Battlestar Galactica on hulu.com. (I am a big geek.)
In both cases, Internet service was provided by Gogo.
I'm a little surprised that you weren't taught any functional languages, like Lisp, Scheme, or ML. It seems like a tragic hole in your college education. From a practical standpoint, it won't necessarily effect your ability to get hired at a bank, but it is surprising. Practically, unless you are working on low-level hardware or kernel code, I would focus on a high-level language like C++, Java, or C#. For C# you can download the free version of Visual Studio; for Java download Eclipse or NetBeans; for C++ learn to love emacs.
More importantly, join a mid-size to large open source project and contribute code. This will teach you important skills that you can only get by programming with other people: the need to use revision control, how to code to different coding standards, and the necessity of coding reviews.
A thorough understanding of revision control is a fundamental part of any professional programmer's skill set. If you have a chance, learn more than one revision control system.
You might want to spend some time learning about relational databases. You should have a good understanding of SQL and concepts like normalization and joins. On the open source side, you can learn about concepts using PostgreSQL or MySQL with InnoDB. On the closed source side, you can download Microsoft's SQL Server Express or Oracle. Both are free for personal development purposes.
Again, a good way to learn professional software development is to work in an public open source project. You'll work with people of different backgrounds and different skill levels. As an added bonus, it's an easy way to show your work (and code) to a prospective employer.