Once an account is made at Anime Sols, you can then pledge towards the making of the final Dear Brother boxset. Pledges of $30 or more will get you a copy of the final boxset as well as bonuses such as clearfiles and artwork from the anime. If you missed out on the first 2 boxsets of Dear Brother, in the final part of pledging you can select to get each of those volumes for $30 a set.
Although the first boxsets for funded shows Creamy Mami and Black Jack have shown up for sale at rightstuf.com, they sell for $60 per set as opposed to $30 that pledgers put towards their production. Hopefully Dear Brother will get enough pledges in time so that the entire series will be produced on DVD!