Server based vs client based aggregation:
JD points to Russel’s post on cell phones need to save bandwidth while using aggregators.
JD says server based aggregation is the way to go as it saves bandwidth on the server and the client side. But client side aggregation also has its advantages.
One advantage is that, users don’t have to wait while loading the data as it is already on the client. The wait time may not matter for text downloads, but is of significance for heavier downloads like videos. One solution to the bandwidth problem is having the updated sites ping a site like weblogs.com and serving the recently updated list throught a service like blo.gs or blogrolling to the client. The client has to visit only the updated sites and download the data before the user requests it. This solution may not work when the client is charged per downloaded data and server based aggregation may be better in that case.