BenQ offers a 15" LCD Monitor that can also be used as a Digital Photo Frame.

The 15" LCD Monitor features a SD/MMC & CF Card Reader built-in on top of the Monitor. It can be used stand-alone as a photo frame without a PC.
Connected to a PC its a standard LCD Monitor with 1024x768 resolution.

Buy.com has the BenQ 15" LCD Display & Digital Photo Frame on Sale for $299.99 after rebate.
This is a pretty good price for a Digital Photo Frame taking into account that this one is 15". Compare to other photo frame products.

Features:

• Product Description - BenQ FP591 - flat panel display - TFT - 15" 
• Device Type - Flat panel display / TFT active matrix 
• Built-in Devices - Stereo speakers 
• Dimensions (WxDxH) - 15.8 in x 7.2 in x 15.4 in 
• Weight - 11.7 lbs 
• Diagonal Size - 15" 
• Viewable Size - 15" 
• Dot Pitch / Pixel Pitch - 0.3 mm 
• Max Resolution - 1024 x 768 / 75 Hz 
• Color Support - 24-bit (16.7M colors) 
• Digital Video Standard - Digital Visual Interface (DVI) 
• Audio Output - Speaker(s) - integrated 
• Compliant Standards - FCC Class B certified, CE, UL, TUV GS, VCCI, C-Tick, BSMI, GOST, EPA Energy Star, FIMKO, ISO 13406-2, TCO '95 
• Power - AC 100/240 V ( 50/60 Hz ) 
• Power Consumption Operational - 50 Watt