Wireless printers have been out for awhile now, and are a godsend if you need to share the device or use a laptop. Bluetooth basically just doesn't work, and IR was always a last resort.
For a basic colour printer with wireless built in try the HP deskjet 6980
http://www.dabs.com/ProductList.asp...y=All&PageMode=3&NavigationKey=0&SearchType=1
Comes with both wired ethernet and wireless 802.11g/b
It also has optional grey in cartridge which is a must if you want to print proper black & white photo's - silver halide qulity.
Lexmark/Dell printers are the worst printers on the market, fine if you want to chuck them away when the ink runs out but hopeless for anything else. Lexmark recently came 6th in a survey on worst brands in the UK. This wasn't just a printer survey, it was across every brand on all products, Lloyds TSB came top IIRC. Lexmark also get consistent C-D rating on the annual PC User reliability survey. HP has received A+ for the last 12 years.
Also don't be tempted to use 3rd party supplies in HP inkjet printers, most inkjet cartridges contain the printheads, the printheads dictate the quality, 3rd party cartridges use secondhand printheads, thus shyte quality. Go online and buy HP originals at 3rd party prices, never ever buy them from high street retailers unless you're desperate.