There haven't been any major developments volcano-wise over the weekend, just a few updates on some current rumblings:
Soufriere Hills (Montserrat) coughed up more ash, producing ash columns to "thousands of feet" according to reports from the MVO. The eruptions/explosions were centered at the lava dome on the summit of the volcano, Seismicity has also increased, suggesting that a larger eruption might be in the works.
Chaiten continues to worry Chilean geologists. Although the eruption seems to have reduced in intensity over the weekend, the fear of a blockage that could lead to a major eruption persists with the SERNAGEOMIN.
Llaima erupted for the third time in 2008 (see above for a picture of the January eruption) as more lava and ash is erupting from the main summit and a lava flow continues to work its way down the snow fields near the summit.
Meanwhile, in Alaska, the AVO still lists Okmok's alert level at Red as it continues to issue ash, upwards of 40,000 feet according to pilots flying near the volcano.