Lensbase (whose prices ROCK) have updated their checkout process, and also added German and Spanish. They will soon be adding more payment methods, and eventually more languages. Their site could use a face lift, but if you looking for great prices, it's THE place to go.
Meanwhile VisionDirect.com (not to be confused with the privately held VisionDirect.co.uk) seems to be having a lot of churn in their executive personnel as their mother company's (DrugStore.com) stock price continues to dive down from their high of $80 a share down to below $3. They've burned through a lot of cash, and expect to continue to lose money though most of the year.