I started with my usb attached printer. Since I have a laptop that I normally don't keep anywhere near my desk (where the all-in-one copier/scanner/printer is), if I ever wanted to print something, I had to walk my laptop (remembering to unplug everything) over to the desk to plug into the usb hub. Ugh. So...I plugged a donated usb bluetooth adapter into my printer, and I can now stream print jobs from my couch 10 feet away (yeah, yeah, small condo). Totally free!
The next project was to get rid of the wired keyboard and mouse. I've shunned bluetooth solutions in the past because the laggy and unresponsive feel of the input was just something I couldn't live with, especially if I was going to be doing some serious gaming with these periphals. This year seems to be the renaissance of rf devices in the 2.4 Ghz range. And when this keyboard/mouse combination became available, I knew I couldn't put it off any longer. No lag, awesome keyboard, and mouse with some serious juice, including a couple of programmable buttons, and a scroll wheel that scrolls vertical AND horizontal. Wut?! Yeah. Really. All wireless, and not bluetooth. $70.
The last wire I had to get rid of was my USB external hard drive. I love it, it's light weight and portable, but...there's this USB cable that I always have to have plugged into the laptop if I wanted to access the files on it. So...I have this Wi-Fi draft n gaming router that I actually get 300 mbps out of, and it has a USB port on it. There is a firmware update for it that allows USB hard drives to be accessible from the WAN connection...duh! Update the firmware, install the network sharing utility (a modified hot-sync'ing utility, from what I can tell), and bam...wireless USB.
UPDATE 2: After crawling through the support forums for this particular feature of D-Link routers, this is about the fastest it's going to get. Full HD content that requires bit rates of 8 mbps and up just will not be able to stream from the USB attached hard drive without some lag. Faster (and more expensive) external USB drives can get up to about 3.75 MB/s, or ~30 mbps. I'm getting in the 14 mbps range, but streaming without buffering is what causes the lag on 1080p content. I was able to configure my Media Player Classic Home Cinema to handle the buffering (using its max setting in the the "EVR custom pres" video renderer), but it still felt like a compromise. Wired USB compares at 189 mbps or 23.8 MB/s for real world file transfer speed. And no lag. Meh. My router has the capability of Wireless USB, but I guess I can live with one more wire into my laptop.
So what's left in the wireless project initiative? I now have only 2 wires plugged into my laptop: an HDMI cable into my receiver, and an AC Adapter. If a standard ever gets adopted between WirelessHD or UWB (Ultra Wide Band), and it doesn't cost an arm and a leg, then I can get rid of the HDMI cable. And...if the wireless recharging experiments finally come to market, I can get rid of the AC Adapter, too. Even so, I'm pretty happy that I was able to pair all my wires down to just these last 2, and all relatively easy, and affordably.