For serious text editing and/or forum posting an external keyboard allows me to type several times faster. The Apple blutooth keyboard is small and lightweight, and it is quick to turn off or on when I need it.
I can type about as fast as EpiciPad on the virtual keyboard, but on a regular keyboard I can type 80-100 wpm. I want to get an Apple Keyboard like wrecklass uses, but I have to raise some funds to buy it.