Welcome to HN, Markus. Please consider sticking around -- many folks here could learn a lot from you. (We have very different businesses but I've been quietly Internet-stalking a lot of your work for years.)
Another highlight, showing how POF early on was all about surprising and obvious innovations (presumably at the expense of polish, as noted elsewhere in the thread). If you're bootstrapping, polish is not your friend. Risky innovations are.
http://plentyoffish.wordpress.com/2013/02/12/10-years-since-...
I particularly love that the blog is still using the default Wordpress theme from years ago. :)
Marcus, you shared a great talk a few months ago at Launch Academy and it really helped me get through a difficult period in starting my company, thank you. I had just bootstrapped my company for 20 months (read: hadn't had a paycheque in 20 months), now we're month 24 and things are rolling quite nicely (read: paid myself in April!!!!).