The call is obv thin but not too bad I think. It's really hard for anyone to tell you because this is comes down to feel. You have to decide for yourself how big his range is.
On a side note, limping here is not as bad as you make it sound, especially because sb has you covered. Ansky had a post in his blog
here about a hand where Gigabet limped in on the button midway through a tournament. I don't know how deep the stacks were, but I'd assume limping with KTo and 27 BBs is probably profitable if openlimping with 23o is ever profitable. I'm sure he had an extra block though [img]/images/graemlins/grin.gif[/img]