This evening I was searching for a solution for this problem when I found a fantastic tweak on Cydia Store. The name of this tweak is iSocialShare.
This tweak adds a "Cloud" that allows you to share a photo directly from the native Camera Roll without having to open any other third part app.
Tapping on this "cloud" brings one-click sharing options for Facebook, Twitter and Tumblr.
For example when you decides to share a photo on Facebook you can add a comment for this photo before tapping the share button.
You need, of course, a jailbroken device to install this tweak.
iSocialShare can be downloaded from Cydia Store under BigBoss repository for $1.99 .
I love this tweak, so I've decided to share it with my followers.
Enjoy it ;)