I am a big fan of Flipboard the best free application to read news on iOS and Android. I am also a big fan of Freshnews.org which I read every morning to get my daily pulse of the tech universe. Unfortunately the two of them do not work well because Freshnews.org does not provide a useful RSS feed and just provides the most clicked feed.
So I had to build my own and for that I simply used the free RSSMix, you basically provide a list of URLs of the feeds you want to aggregate and it provides you a url of the resulting mix.
For example for freshnews.org I collected all the following feeds:
http://rss.slashdot.org/Slashdot/slashdot/tohttp://feeds.feedburner.com/cnet/NnTvhttp://feeds.pinboard.in/rss/recent/http://www.reddit.com/.rsshttp://www.gizmodo.com/index.xmlhttp://freecode.com/?format=atomhttp://mobile.engadget.com/rss.xmlhttp://rss.news.yahoo.com/rss/techhttp://www.techdirt.com/techdirt_rss.xmlhttp://feeds.arstechnica.com/arstechnica/everythinghttp://www.theregister.co.uk/headlines.atomhttp://www.theinquirer.net/feeds/rss/type/newshttp://www.amazon.com/gp/rss/movers-and-shakers/electronics/ref=zg_bsms_electronics_rsslinkhttp://feeds.feedburner.com/thenextwebhttp://gigaomnetwork.com/feed/http://www.osnews.com/files/recent.xmlhttp://news.ycombinator.com/rsshttp://www.techmeme.com/index.xmlhttp://www.digitaltrends.com/feed/http://feeds.gawker.com/lifehacker/fullhttp://techcrunch.com/feed/http://feedproxy.google.com/CrunchGearhttp://feeds.feedburner.com/neowin-mainhttp://feeds.gawker.com/io9/fullhttp://feeds.feedburner.com/AskMetafilterhttp://feeds.wired.com/wired/indexhttp://www.tuaw.com/rss.xmlhttp://www.tomshardware.com/feeds/rss2/tom-s-hardware-us,18-1.xmlhttp://feeds.macrumors.com/MacRumors-All
I entered all of them into RSSMix with a simple copy and paste. RSSMix produced a useable url (http://www.rssmix.com/u/3627315/rss.xml) that I manually entered into Flipboard and everything worked!