invoicing

I know we've postponed the panel discussion on project pricing, but I'm wondering what other freelancers are using for their accounting software?? I'm currently using LessAccounting, http://lessaccounting.com and so far I've been able to figure it out easily enough. My problem is, the invoices themselves are rather unattractive and they are not customizable.

I'm interested in web based solutions, but won't discount (sorry for the pun) software that runs locally. I'm 100% Linux based. What are you using to invoice clients?

Regards,

Mark