Is there a place to get better documentation on what data will be accepted for specific fields in specific objects?  For example, all I know about the "Last Name" field in the Lead object is that it accepts a string.  Will it accept any length string?  Am I missing a piece of documentation somewhere?  Thanks.

I am attempting create/modifify a task using the sForce 2.0 Partner version.  I am having a difficult time understanding the sObject that is used in creation objects in your system.  I understand that an sObject array is neccessary, but not sure how the sObjects in that array are setup.  Any help would be greatly appreciated...  An example would be nice.

-- Glenn