I have put out a new release over the weekend (beta) of the .NET wrapper -- also the source for the wrapper & Testing UI have been uploaded.
As a side note I wanted to re-organize the source directory to be more like my test server, but CodePlex makes some things difficult (just my opinion) so try to ignore all the 'attempts' and just take the lastest change set :-)
Depending on when MailChimp releases their api changes (expected this week) -- and how many & how time consuming they are to implement -- I may decide to do a second beta release later with those changes included, rather than having this release go 'live'
and have to follow up with another release to include them.
I'll let you know as soon as I have a chance to see the new MC api changes.