Being on one of them for more than 10 days, I checked for a ferry connecting the islands. It's back there! It sails three times a week southwards from Corfu (MWF) and three times northbound from Zante (TTS); no service on Sundays. The harbours are Corfu-Paxoi-Lefkada-Meganissi-Ithaca-Sami (Cephalonia) and Zante. No cars or bikes on the (smallish but fast) cat. The company's site is at www.lefkadapalace.com (for details). Since I've not used the ferry's service, I can't offer any opinion on what to expect.