I recently broke the graphics drivers on my Windows Vista installation, so re-partitioned and now run Ubuntu full-time at home.
On Windows I use FeedDemon as my full-time aggregator. It has a degree of speed and polish unmatched by any other web or desktop aggregator.
This means that all my feeds are automatically synced with newsgator.com – a web-based aggregator which is not fast and not particularly polished. Although it might be polished, I don’t know, it’s so slow that I tend to just give up (sync with Google Reader is coming).
FeedDemon has significantly raised the bar for any aggregator I use. Web-based tools no longer cut it, in particular when I have hundreds of feeds and, at times, thousands of unread items.
On Ubuntu the options for a native aggregator are Straw or Liferea. Both are currently undergoing rewrites. Liferea seems like the better option for me, and it has a plugin system which is appealing, but there’s no sync with any online tools.
NewsGator have an HTTP-basd API (PDF reference and sample code which requires a minor tweak to run) which is quite straightforward. It gives back data which can be consumed by the Universal Feed Parser. Venus uses the Universal Feed Parser in planet/spider.py after fetching data to create the cache which powers it.
This time last year I wrote a very very basic wxWidgets tool for browsing the Venus cache. A modification to planet/spider.py to use the NewsGator API would seem like an easy way forward, whilst gaining all the power of the Venus filters, plugins and existing XSLTs.
I might just have to try that.