Today's much-anticipated meeting in Montreux marks the beginning of the "Geneva 2" negotiations over Syria. Like most observers, I don't see a high probability of a major breakthrough that leads to an interim government and the removal of Bashar al-Asad; his Foreign Minister ruled that out yet again today. A best-case scenario might be a ceasefire, even a temporary one, that could allow for relief efforts to aid suffering refugees. (Though of course one could hope for more.) The absence from the table of most of he actual rebel groups who control he battlefield makes even a ceasefire hard to achieve, and day one seems to have mostly been a predictable one, with the two sides denouncing each other.
A solution creating an interim government my be achievable in time, but I fear that the Asad regime's internal support may need to crumble a lot more than it has so far, and recent battlefield successes may have actually reinvigorated it.
The curious dance in which Iran was invited and then disinvited may not have helped that much, either, since Iran is a player and probably would need to be involved in any real breakthrough.