I tried myplates.com -- they were VERY expensive and quite limited in their letter/number combinations.
Texas limits plates to only 6 characters at the moment, so with DORY as 4 of them I'm limited. I can't have any spaces, so whatever I choose will be run together. So I can't do I M DORY, and MYDORY OR TXDORY will be squashed with no spaces.
I know we're going to 7 characters in 09 but I don't know when. I could at least them get IM DORY. I may stop by my local DMV early this week to ask them about it. Since I'm in a small town our DMV is an easy in/out. And the people are friendly.