Originally planned for October, but here it is: Skype-over-laptop-over-cellular (UMTS), or wVoIP. On-net calling is free and comes with a free headset (promo). Naturally, the client is free too. The offer is for flat-fee data subscribers: 40 EUR/mo.
It's a first for VoIP-over-cellular and sounds like the long-term smart move for E-Plus (KPN). Forget about voice, try to lure your subscribers into (flat-fee) broadband subscriptions.