Thank you kindly, Snowdrop, for a patch that solves:

The current API for MRM is quite sparse, this patch 
supplies basic support for accessing the task 
inventory of object.

OpenSim/Region/OptionalModules/Scripting/Minimodule/Interfaces/IInventoryItem.cs

@@ -0,0 +1,16 @@
+using System;
+using OpenMetaverse;
+
+namespace OpenSim.Region.OptionalModules.Scripting.Minimodule
+{
+	
+	/// <summary>
+	/// This implements the methods needed to operate on individual inventory items.
+	/// </summary>
+	public interface IInventoryItem
+	{
+		int Type { get; }
+		UUID AssetID { get; }
+		T RetreiveAsset<T>() where T : OpenMetaverse.Asset, new();
+	}
+}