Today only, Newegg offers the LG 29" UltraWide IPS LED LCD Monitor, model no. 29UB55-B, for $229.99. This $30 mail-in rebate cuts that to $199.99. With free shipping that's $80 under last month's mention and the lowest total price we've seen. (It's a current low by $80.) It features a 2560x1080 native resolution, LED backlight, and DisplayPort, HDMI, and DVI inputs.
Update: Apply coupon code "VCOBF15" and checkout via Visa Checkout to cut the price further to $174.99.