Build something slightly enterprisey but really simple. Make sure it uses lots of enterprise buzzwords like XML, LDAP, SOAP, and UML. You could make something pretty simple that an enterprise client might find useful, like some sort of process management tool, otherwise known as flowcharts. Generally the only difference between enterprise software and not is the price tag. Surely there are exceptions to this.

I'd also suggest that before you dedicate a significant part of your life to learning something because there is currently a high demand for it in your geographic area, you may want to consider reading the excellent:

http://www.pragprog.com/titles/cfcar2/the-passionate-program...

Check out the reviews on amazon - might also be helpful to look at reviews for the out of print My Job Went to India. The passionate programmer is the 2nd edition of this book I gather.