My company (Envato.com) is looking at changing our accounting/ERP system and I'm curious to know what other startups and tech companies use? Apparently eBay/PayPal use SAP, but that is a little too large for us :-)
The 'E' in ERP is for 'Enterprise' (<a href="http://en.wikipedia.org/wiki/Enterprise_resource_planning" rel="nofollow">http://en.wikipedia.org/wiki/Enterprise_resource_planning</a>), which in my mind is another stage of development beyond startups.<p>As pbreit says, use QuickBooks.
So far my investigations have led me to a few interesting companies using Netsuite, specifically Groupon, Sixapart, Gawker and Atlassian. Still investigating :-)