service oriented zen cart sites?

[contrive.it]

Ive recently applied zen-cart to a clients ecommerce site and we couldn't be more happy with the ease of use, many functions and immediate seo.

His site sells products but I was wondering if anyone (knows anyone who) has applied zen-cart to a site that sells services rather than products. I'd like to get some ideas before I give it a go. Any links and/or input appreciated.

Thanks!