I do. I had intended to withdraw my coins from Instawallet for a long time, before finally doing in smaller chunks in the week preceding the "hack". In hindsight, it appears I was quite lucky.
I am in no way affiliated with Instawallet or its operators. Great detective work, though!
In response to Phinnaeus Gage's post on the bitcointalk.org forums (dated April 05, 2014), I, terrytibbs, hereby prove that I am the owner of 1uKVtMUK7E2CkVynYa7ytnTu6wGqFTxUV.
HDmgIHsSP0SfBhCGickiyYqY3n0YLrlSR3L6Li6U6yUyFaBWaSxIDf4g/9x3bklk/oTqOUEdVnwERHnyYqopQ7c=