Unfortunately, online applications such as Google Docs and Docs.com are not the great solution for tablets that they could be--at least not beyond basic word processing. In practice, they're simply too keyboard- and mouse-oriented to be used efficiently on a tablet.
Keyboard, Mouse, and Stylus
Of course, dragging a keyboard and mouse around with you begs the question, "Why didn't I just buy a laptop?" But if you type a lot, you'll need a real keyboard. Using peripherals with a tablet isn't as zany an idea as you might think--after all, those tools will make certain tasks easier, and you'll still have the tablet to use as such when you're not employing them.
Windows 7 tablets all have USB ports, and most offer Bluetooth, so you can use basically any keyboard or mouse on the market. Some Android tablets have USB ports, but the iPad 2 and many Android tablets rely solely on Bluetooth for peripheral connections.
The $69 Apple Wireless Keyboard and Logitech's $70 Bluetooth Tablet Keyboard for iPad 2 and for Android (3.0+) are decent units that won't weigh you down too much. Logitech also makes a $130 folding keyboard that travels a little more compactly, and the company's $100 keyboard/case for the Samsung Galaxy (10.1 inches) is another workable solution. With Windows 7, a portable mouse is a good and necessary accessory. Navigating its non-finger-optimized interface is difficult at best without it or a stylus. Any of a host of USB (including wireless) and Bluetooth mice that work on laptops and desktops will work just fine on a Windows 7 tablet.
Most tablets, like the iPad, have a capacitive touchscreen, which senses input from conductive materials, such as a living finger. These will work only with your finger, or a chunky capacitive stylus. But for serious drawing or for taking handwritten notes, you'll need a special pen-and-tablet combination.
Many of the business-focused Android and Windows slates come with active digitizer technology--which requires an electronic pen--in addition to the capacitive touchscreen. An active digitizer lets you lay your hand on the screen without interfering with the pen's input, and increases accuracy and pressure sensitivity.
N-Trig-based tablets are great for those who do a lot of handwriting or a little drawing. N-Trig’s Duo Sense dual pen and touch-active digitizers are found in Android tablets with N-Trig’s digitizer, such as the HTC Flyer and Jetstream and the Lenovo ThinkPad Tablet. N-Trig-based Windows slates include the Fujitsu Q550, both the HP Slate 500 and the newer Slate 2, and the Motion CL900.
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