We were able to dig up a few more specs on the LG Fathom that is rumored to be headed to Verizon in May.
The Windows Phone measures 4.53x2.2x.65 inches and weighs 5.36 ounces. It should have a 3.2" 480x800 resistive touch screen, 256mb RAM, 512mb ROM, microSD expansion card slot, and 3.5mm headphone jack. The Fathom is fitted with a side-sliding keyboard and 3.2 megapixel camera. There is no indication on processor or battery size.
Keep in mind that the image provided by phonearena.com is likely an early prototype and the finished product (complete with Verizon branding)may have a slightly different appearance.