I recently got my PS3, and have already gotten sick of using the D-Pad and X button to type out every single damn letter. Instead of putting up with it, as using the PS3 for internet like I am now, typing can mean writing more than one word or phrase.
An easy solution to this is the USB Keyboard.
Not alot of people think they own a USB Keyboard, until they check it out. This works best if you have old computer accessories lieing around.
I was salvaging my old Win95 [Yes, its that old], and picked off a fully functional keyboard. It has a USB Connection [Suprise Surpise], so it works perfectly.
If you dont happen to have a spare computer keyboard lieing around, look into getting a PS2 Keyboard as it works the same thing. Just plug it into the PS3 Controller Port.

I know how easy this sounds, I just thought I would post it up since alot of people think they need a Special PS3 Keyboard to work with the PS3's typing. Well you dont.
This saves alot of time and frustration while trying to type long text material.

Another option especially for those who also have a PC sitting under the TV next to the PS3 is to use a USB KVM switch (for example a 2-port Belkin Omniview) which will handle the conversion from PS/2 keyboards and mice to the USB port of the PS3.

I own one of the older versions of the Logitech Cordless desktops (keyboard and mouse), which only had PS/2 connectors and it works great!

NB: by PS/2 I don't mean Playstation 2, but those tiny round purple or green PC connectors also known as mini-din