Awww so glad to hear you also tried Quiche Reader! I'm actually hoping to make both apps work together in the future.
Implementing custom search engines would be easy, but I would not be able to support their autosuggest API, since they all require custom parsing rules.
I write about technical stuff I encounter throughout my day, mostly as a support for myself remembering it. Since it might be interesting for some people I asked myself why not putting it into some blog format.
What I am missing besides all the customization is the possibility to set a custom search engine. Would be great to see this coming in an update.
Keep up the great work!