Do you think Roundcube deserves the version 1.0?

yes, of course! :)

Together with this simple yes-no question, I'd also like to give you
the opportunity to submit your personal "1.0 wish list". Feel free to
post your top 3 must-have features you're currently missing in
Roundcube. Your feedback will help us to hopefully make the right
decisions and to do the further planning for the roadmap beyond the
1.0 release.

1) implement great search engine, or make external ones (solr, sphinx,..) possible

2) Wordpress alike plugin system (this would make roundcube really awesome) - was mentioned before

3) customizable keyboard shortcuts :)

thanks for your great effort!

andy