Just walking away may seem like the easiest way out, but it may in fact make things more complicated for you. If you have a HELOC, I do believe a short sale is usually worth the hassle. At the very least, a short sale gives you the opportunity to negotiate with your lender up front - and, foreclosure is always there as an option, but a short sale isn't.
One of the worst things that distressed Central Coast homeowners do is waiting until the clock is ticking before contacting a short sale agent. When does the clock start ticking? I tell people it starts ticking when you stop paying. Ideally, if you know a financial hardship is imminent, you should begin exploring your options, including a short sale, before any payments are even missed. In its recent Open Letter on Short Sales, the California Association Realtors reports that according to surveyed California Realtors® only about three out of five short sales close.
Short sales are popping up all over the Central Coast of CA due to the recent housing boom/bust. Many buyers are interested in these properties because they offer the possibility of today's prices with less competition from other buyers.