I know of no plans to make another computer version of A&A. However, there are several organizations that host on-line play of various types, including GameTable Online and AAMC. A Google search should turn most of them up.
I don’t know much about TripleA but I like abattlemap and using a online dice roller. I made a tutorial to help people use it and the dicey roller, found at www.axisandallies.us. I play at www.aamc.net