A major goal for this release was to refactor the code, looking to reduce the size of codebase and improve efficiency, yet maintain readability. This should be a significantly improved release internally, and required more extensive testing than some other releases. Thus the giant jump to 0.6.0!

Check the Issue Tracker for changes not documented below.
See my blog post jQuery Library for SharePoint Web Services (SPServices) v0.6.0 Released for the prose version.

New Functionality

Alpha	Issue Tracker Item	Function	Operation	Description

New Operations

Alpha	Web Service	Operation	Options	MSDN Documentation	Issue Tracker Item
ALPHA4	SiteData	GetList -> Must be called as SiteDataGetList	[webURL], strListName	SiteData.GetList Method	NA
ALPHA4	SiteData	GetListCollection -> Must be called as SiteDataGetListCollection	[webURL]	SiteData.GetListCollection Method	NA
ALPHA4	Webs	UpdateViewHtml	objectUrl	Webs.GetObjectIdFromUrl Method	NA
ALPHA4	Workflow	AlterToDo	item, todoId, todoListId, taskData	Workflow.AlterToDo Method	NA

User and Groups: See the Users and Groups Web Service documentation page for ops added for issue 7814.
Views: See the Views Web Service documentation page for ops added for issue 7650.

Bug Fixes and Efficiency

Alpha	Issue Tracker Item	Function	Operation	Description
ALPHA1+2	7657	$().SPServices	All	Convert multiple calls to wrapNode with calls to addToPayload
ALPHA2	7656	$().SPServices.SPLookupAddNew, $().SPServices.SPDisplayRelatedInfo	NA	New Internal Function getListFormUrl(l, f)
ALPHA2	7604	$().SPServices.SPDisplayRelatedInfo	NA	SPServices.SPDisplayRelatedInfo needs to handle LookupMulti
ALPHA2	7664	$().SPServices.SPDisplayRelatedInfo	NA	SPDisplayRelatedInfo: Add Source Query String parameter for Lookup and LookupMulti column links
ALPHA4	7802	$().SPServices.SPCascadeDropdowns	NA	SPCascadeDropdowns with a German Site
ALPHA4	7810	$().SPServices.SPListNameFromUrl	NA	SPListNameFromUrl - Eliminate WS calls if list is already known
ALPHA4	7705	$().SPServices.SPUpdateMultipleListItems	NA	Add completefunc
ALPHA5	7858	$().SPServices.SPScriptAudit	NA	SPScriptAudit: listName option ignored
ALPHA5	7859	$().SPServices.SPScriptAudit	NA	SPScriptAudit return not what expected