Experimintally remapped ido:

TAB -> restrict to searches
C-SPC -> insert SPC

SPC is default ido-complete-space

More reliance on C-r, C-s (since they're well-positioned on colemak)
Made ido mappings more consistent with, e.g. auto-complete-mode:

tab -> complete

accounting for frequency:

SPC -> restrict to found
C-SPC -> insert SPC