With regards to the wallet I think we should wait to hear an actual developer's opinion on open\closed source possibilities.
I'm re-posting one of stormia's posts because I think the multi-pool is another good way for community members to show support. Make sure you check out the Reddit post below for a great explanation of how using the multi-pool benefits Mintcoin.
Cool when will my first coins be sent out?
Another way you can get MINTs without buying them is through using the the MintCoin multipool at hashcow:
http://hashco.wsJust sign up and make sure to go to account settings and change the payout to Mint.
Hashcow is doing this promotion right now:
We are approaching 1 week since payouts in MINT were implemented on
http://hashco.ws While I appreciate the new miners who have given us a shot and 'mined' some mint, the uptake isn't quite what I'd hoped for. In an effort to try and get things going, I received a total of 1,850,000 mint in bounties for implementation. If we can reach 300Mh/s in new hashrate that gets paid out in mint, and maintain it for at least 5 days, I'll give away all of it to random miners in the form of 3 prizes; 1mil, 600k, 250k. (personal hashrate will play no bearing on the prize winners, 10Mh/s or 300Kh/s, you'll have the same chance of winning).
I'll post updates here on hashrate status if warranted.
Happy Mining.
Check out this post to see how this multipool works and how it benefits the coin and the community:
http://www.reddit.com/r/MintCoin/comments/21yd31/why_i_moved_my_farm_40mh_to_hashcows_and_why_you/