Sharepoint 2010 useful links
Pattern validation using infopath
http://msdn.microsoft.com/en-us/library/gg180738.aspx#ip2010CustomizeList_Pt3
How to associate the list manually after the initial Sharepoint customization wizard.
InfoPath cannot open the selected form because of an error in the form’s code.
Policy settings prevent opening Internet forms with managed code. To fix this problem, contact your system administrator
http://www.infopathdev.com/blogs/ernesto/archive/2011/09/15/cannot-preview-a-form-with-qrules.aspx
infopath 2010 event from VSTA does not trigger in browser