When Google registers domain names, we should listen. Rarely do they point these domains anywhere, but they often foreshadow new products or services. For example, if Google registers google-widgets.com, often we can expect to see a service like widgets.google.com coming soon.
Mashups are the subject of a flurry of domain registration activity from Google recently -- as Gary Price notes, it's not about maps, but search. Here is a list of the newly registered domains:
They have covered almost every combination of "search" and "mashup" possible, so now it's time to make a few predictions. Google has been pushing the Google AJAX Search API pretty hard recently -- giving us some mashups of their own, and calling out for samples that other people have made.
I am thinking these domains are probably a sign they are working on a directory of mashups. Gary also guesses that the domains could refer to a something like Rollyo -- similar to what I guessed "IndexBench" could mean last week. What do you think?