You can now use LocalBitcoins to accept bitcoins and send bitcoin invoices to your customers. LocalBitcoins has opened Merchant tools section on the site where you can send and manage invoices.
The invoiced amount to pay can be denominated in any currency. When the recipient opens the invoice, the price is converted to bitcoins using the current exchange rate.
Each invoice has a unique bitcoin address as the payment reference. The payment can be made with any bitcoin wallet, including QR code compatible mobile wallets.
Accept bitcoin - send invoices, get paid in bitcoin