Remarkably, your mileage expiration date is STILL not listed on your DM account when you log in! This is truly crazy -- and can be a bit mean. It's not like they're really trying to hide it from you, because they send you a monthly statement with the date listed (I guess you could opt out of these emails) and they send you a separate notice a few months from your expiration.
In my family, we're CO (soon to be UA) elites and we credit our general Star Alliance mileage there. I did the free "toolbar" bonus sign up (you can find a thread in this forum) and the necessary credit did post about a month later. I went to check our new expiration dates, and it's just not there. I guess I'll wait for my next monthly statement to see that new date, and try to make a note of it.