Amy Roloff is somewhat 'twittering' or blogging.
It's located in the "News" tab of her Charity Foundation website.
Amy (and some of them were by her friends helping her with her charity foundation) had some entries previously that were related to her upcoming charity golf tournament, but today she seems to be making a few comments about other things, more along the lines of Twitter or Facebook status updates (which basically is what twitter is though some celebrities choose to communicate directly with their fans).
Amy says she's planning a sweet 16 birthday party for Molly.
She says the weeds in her garden are out of control with all the travel she's been doing and the twins are off to school soon.
I think blogging on her charity foundation website is a smart way to keep coming to her charity foundation website. Trust me, the personal things are what interests people about the Roloffs. The only drawback I see with Amy blogging or using her Charity Foundation website like that is that it kind of renders her official website somewhat useless. Her blog on her official website only has two entries in one year. Perhaps after her golf tournament, she'll shift her blogging entries to her official website?
Amy's charity foundation twitter account which she does not run, posts "tweets" when she has a new entry which leads to this page which is the same as the news tab on her charity foundation website.
On the subject of twitter, I think it's interesting that the TLC twitter account confirmed that Jon Gosselin is using twitter. Whenever twitter users have asked TLC if the Roloffs use twitter, TLC has always said none of the Roloffs have accounts - even though Amy Roloff's account "realamyroloff" was legitimate until it disappeared.