Laptop is not a small stuff, you need something that is smaller and demulcent your self. I think flashdisk is nice storage to save many of applications and data. But how if you face with big data like your database or webhost? how much money you spend to buy hosting for uploading your data there? or is it possible to finish your application that support database but you dont have database there? dont you think that portability is the right answer for you, programmer, who is very mobile?

Server2Go maybe can help you in this problem. Server2Go has all you need to get your Webapplication running

• Apache 1.3.x, 2.0.x and 2.2.x (V1.6.0 off Server2Go or greater)
• PHP 5.2.x with a lot of Extensions. Downgrade packages to 4.4.x and 5.0.x available)
• MySQL 5 support
• Perl 5.8 with a lot of CPAN modules integrated