PaidContent seems to have the
scoop on this story, Monitor110 has
announced it is to close its doors. The reason stated is inability to close a second round of VC funding, after raising an initial $11m in late 2006.
There are lots of companies entering the sector that Monitor110 formerly inhabited, it'll be interesting to see whether they prosper. I'd expect further consolidation and/or fallout.
Monitor110 had high profile venture investor - and blogger at
Information Arbitrage - Roger Ehrenberg as one its backers.