I am not in Siem Reap at the moment and have no first hand knowledge of the current flooding situation, but people keep sending me emails asking about it so I thought I'd pass on what little I know and a few links to forums, bloggers and tweeters that are there and have posted recent info regarding the current flooding in Siem Reap town.
News is that Siem Reap town is flooding again - 3rd time in the last month. Apparently, like before, the river through town began overflowing yesterday afternoon and has continued today. According to friends up there, as of a few hours ago, the flooding is in pretty much the same areas as last week (see my post of September 26 Siem Reap Flooding - Trip Report) but so far not as deep or extensive. The situation is likely evolving as I write.
'Only in Cambodia' blog has just (Oct 10) posted photos and information about the current flooding: Water, Water Everywhere "OK. So We're going through our 3rd flood in Siem Reap where the river has over flown its banks and spilled into the streets turning them into extended tributaries. From morning to afternoon, the river rose and spilled over so that you couldn't see its banks..." Click the link to read more.
Rosy Guesthouse, located on the east side of the river in the center of town also sometimes tweets about the flooding: Rosy Guesthouse
Canby Publications does a pretty good job of collecting and retweeting information about the flooding: Canby_Cambodia
Journey's Within Boutique Hotel is located in Siem Reap and is tweeting a bit about the flooding as well: JWBoutiqueHotel
TripAdvisor has a running thread on its travel forum where people have been posting up-to-date information on the flooding in Siem Reap town. Make sure to check out the end of the thread for the latest info: Flooding in Siem Reap
Mekong River Commission situation report. Current flooding situation and forecast for areas along the Mekong River through Southeast Asia. Information on Phnom Penh and other Cambodian cities along the Mekong, but no info on Siem Reap: Mekong River Commission
Article in today's Phnom Penh Post on the flooding situation in Cambodia in general, not specifically about Siem Reap: Death toll rises; risk at riverbanks