One of their examples of the letter Ches (below right) has a chatoteres, somewhat resembling the Ksav Ashuri Ches according to Rabbeinu Tam:
|The Nabataen Ches (Heth)|
One of their examples of the letter Yud (below left) vaguely resembles the Ksav Ashuri Yud, with a sort of tag above, and an ooketz below:
|The Nabataen Yud (Yodh)|
One of their examples of the letter Tzadik (below left) is similar to the Ksav Ashuri Tzadik (albeit crooked), with the right head facing right as in Ksav Ari zal.
|The Nabataen Tzadik (Sad'e)|
You can see the entire script here: http://en.wikipedia.org/wiki/Nabataean_alphabet