You can change your max search length in the cp; you can search any ammount of dates.
Spellcheck does not exist in the ubb because of the vast array of words in the english (and foreign) dictionaries it'd have to use a remote service; as remote services are unreliable it'd be a pain to have it as an official feature; there is however a modification at ubbdev.
Members can upload photos, with the attachment system.
You can see where your islands are used at the portal settings.
Can't comment on your other ones though.
Captcha was my main goal with testing for 7.1, i made the suggestions before 7.0 was finalized.
You can grab a full list of added features and bux fixes in the changelog.
