Disclaimer up front - I'm definitely not going to include any links in here - this question isn't part of my marketing!

I've had a few projects recently where the end product is something that developers will use.

In the past I've been on the receiving end of all sorts of marketing - as a developer I've gotten no end of junk - 1000s of pens, tee-shirts and mouse pads; enough CDs to keep my desk tea-free; some very useful USB keys with some logos I no longer recognise; a small forest's worth of leaflets; a bulging spam folder full of ignored emails, etc...

So that's my question - What are good ways to market to developers?

And as an aside - are developers the wrong people to target? - since we so often don't have a purchasing budget anyways!