There were a few updates as of this morning but we'll summarize here and make you go to Mobile Digerati for updates and news from Barcelona and elsewhere.
So far, Microsoft has made the biggest splash with previews of Windows Mobile 6.5. Still, WM7 is what everyone's interested in. But at least a ".5" may afford Redmond the time to hold on a bit longer until WM7 with Zune comes out, hopefully, in late 2009.
Not making a splash is Android so far.
Anyway, please visit Mobile Digerati for news on all things mobile.