I created a nuget package for plugins developing.
Instead to add dll's manually each time just use this package (also useful when you need to upgrade plugin to next nop version)
Install-Package NopCommerce.Core
http://www.nuget.org/packages/NopCommerce.Core/Also you can add post build events to your project to copy dll's and views to plugin folder.
robocopy "$(ProjectDir)bin" "C:\inetpub\wwwroot\dev.nopcommerce.com\bin" "$(TargetFileName)" /E /XO /XD ".svn"
robocopy "$(ProjectDir)bin" "C:\inetpub\wwwroot\dev.nopcommerce.com\Plugins\Payments.MyPlugin" "$(TargetFileName)" /E /XO /XD ".svn"
robocopy "$(ProjectDir)Views" "C:\inetpub\wwwroot\dev.nopcommerce.com\Plugins\Payments.MyPlugin\Views" "*.*" /E /XO /XD ".svn"
exit 0
I don't like to "Reload plugin lists" on each build, so i add copy to bin also
Yarik