Hi there, this is the developer of NewsSpot writing. If you don't mind I'd like to add some (biased :wink: ) information about the differences between NewsSpot and Wonder Reader:
Wonder uses an always online model for accessing Google Reader, i.e. it only downloads what is needed for the current view. Actually this is quite nice if you’re always online (obviously), since then it might be faster than NewsSpot, especially if you have a lot of articles. However, NewsSpot has a full two-way sync engine, i.e. you sync once and then you have the articles and images on your phone and you don’t have to care about signal strength or your data plan anymore. Plus, searching your articles becomes quite snappy this way; it almost works like the built in email app, just try it.
On the plus side for Wonder I would say is sharing and notes in Google Reader, an API which is not officially supported by Google anymore. For NewsSpot I would claim that it has the best sharing and saving options, with e.g. Evernote, Delicious, Diigo besides the ones that are always present (like Twitter, Facebook, Pocket and Instapaper).
Eventually I’d like to see people testing the available options and going for their favorite then. I know NewsSpot was a bit late to the party, but like zedmartinez said, I’m working hard on getting this thing better, and with the recent versions I’m happy to seeing more and more people saying it has become a competitive choice.