Over the weekend, the Dashboard was updated to display additional PPLNS statistics that were not previously shown. These include your contribution (as a percentage) to each shift, and also a listing of how much you’ve earned from the most recent blocks.
Additionally, the ‘NMC Account Balance’ is now part of the Dashboard regardless of your settings. This is only temporary until the rest of the Dashboard updates are pushed live.
If you’re not familiar with Namecoins, do not worry! NMC is produced with BTC simultaneously. You do not lose any BTC or mining speed while generating NMC.