I found this somewhere on his site:
Orientation: orient=”v” // v = Vertical , h = Horizontal default ‘v’
Display only images: imgo=”false” // true, false default ‘false’
Display post title: ttgo=”false” // true, false default ‘false’
Display post date: dtgo=”false” // true, false default ‘false’
Date Format: dtfrm=”1″ // 1 – d/m/y , 2 – m/d/y default ‘1’
Category Slug: categ=” // leave out or blank for all categories default ”
Number of Posts: postnr=”20″ //default=20
Number of registers per line: linn=”3″ //default=3 only for horizontal orientation
Table result width: divwid=300 // default=300
Thumbnails Width: tbwid=”40″ //default = 40
Thumbnails Height: tbhig=”40″ //default = 40
Result Table Cellpadding: cp=”4″ // default= 4
Result Table Cellspacing: cs=”4″ // default= 4
Column layout: lwt = 1 // default= 1
Widget(or list) title: tte= “” // default=””
Suppress Thumbnails: sptb=”false” // true, false default ‘false’
Target links to a blank page/tab: tgtb=”false” // true, false default ‘false’
Order: ordm = “DESC” // DESC, ASC default ‘DESC’
Order By: ordf = “ID” // ID, Date, Title, Random default ‘ID’
Custom Field Key: metk = “” // default ”
Custom Field Values Type: mett = “” // n(numeric),t(text) default ‘n’ numeric
Registers per Page(beta feature): pgin = “” // default= ”
Post Type: ptype=”post” // default=’post’ ‘post’ or ‘page’
Display Excerpt: dexcp=”false” // true, false default ‘false’
Get featured image(instead of first image): gptb=”false” // true, false default ‘false’
