The higher level aggregators have started coming about. One of notice is Kinja which uses xhtml 1.0 strict and css in its site. But doesnt give off another feedm which is a real shame. So I count this as more a end of the line aggregator, kinda of like google, etc. Still prefer bloglines, but ultimatly the best is still something like flock, which gives off a rss feed too. I have started using cocoon's aggregator, which is pretty awesome too. Specially because any one with a bit of xsl can knock out decent feeds.
