Credit: Akibahara News
Here's something that would let you doodle on the screen of your non-tablet laptop;
Japan's Hanwah Duo for Laptop converts an average notebook into a tablet with the use of Infrared and Ultrasonic technology. So simple to use: you just have to mount the receiver atop the screen then write on the LCD with the special pen. Cool, right?
The only drawback is that it only compatible with 15"4 screens - so no small screens for now. Oddly enough though, this photo shows that you can also attach the receiver to any sheet of paper and convert it into a working tablet for your PC;
Laptop Duo retails for around $100 (Php5000+/-) and has yet to reach the Philippines.