**UPDATED** 8/22 12AM PST Ryan just provided us with an update with more details about the filming currently occurring. I have added a Google satellite image of where they are filming.
As I assumed, it seems to be a scene shortly after Sayid gets Hurley out of Santa because Ryan mentions Hurley being in a robe.
NOTE: Original post is below and Ryan said he was heading back to the set so stay tuned for MORE updates soon!
They’ve commandeered a four-story apartment complex at 1818 Anapuni St. to film a scene with Naveen Andrews and Jorge Garcia.
It’s a night shoot, with Klieg lights on cranes illuminating the whole building. It was raining when shooting started, so they kept the parking lot wet with a hose. In one corner, dozens of empty cardboard boxes and several large athletic-style foam blocks. On the corner, an ambulance. Looks like a stunt fall is in the cards.
The scene so far? Hurley and Sayid drive into the apartment complex parking lot in a late-model blue SUV. (It and the other cars have California plates.) They exit, Sayid looking sharp in a black shirt and dark khaki pants, Hurley wearing a thick, long, grey bathrobe over a blue T-shirt. Hurley’s also holding a big burger and paper cup. They make their way stealthily up the stairs, and walk the length of the building, past several apartments.
Security is keeping an eye on me. I even voluntarily submitted to a bag search. These guys don’t mess around, but fortunately I’m also a known factor. They’ve yelled down several other people with cameras. People who, of course, I go out of my way to meet. Otherwise, I’m just standing under the lighting crane, watching Hurley and Sayid walk. Again and again and again…
Source: Hawaii Blog http://spoilerslost.blogspot.com/