Zetoc is the electronic table of contents service from the British Library. The British library is a copyright library, so receives copies of just about anything you can think and many that you can’t. You may already use Zetoc email alerts, which sends an email to you containing results from saved search terms. Another option is to get the Electronic table of contents direct to your browser, so you can have the latest issues from Nature genetics or Cell automatically appear in your browser. To do this, use Zetoc: RSS and an RSS aggregator and go and look for your favourite journals.
A good place to start with RSS is by looking at ‘what the heck is RSS ?’