Sorry to bring up this old theme, but HelveticaNeue looks amazing on my 800x480 screen on the Galaxy S2+.
Unfortunately it does not contain the Cyrillic symbols, despite being the largest file (or i have a misconfiguration somewhere). Franklin is closest to it and does cover Cyrillic. The Roboto family does that too, but is too narrow for my taste.
Thank you very much for the great selection, it does certainly bring new looks to my device.