anotherthing...
You're going to need some half-decent software, mate.
I use Photoshop CS3, Photomatix (excellent tool for Tone Mapping) and I tidy up the inevitible 'noise' in my HDRs with Neat Image.
There's a few hundred quid's worth of software there, which I personally can legitimise buying for work purposes, but I've noticed recently that you can download all of the above for free as bit torrents, if that's your thing. I won't tell.
There's a really useful tutorial on HDR and post-production in April's Digital Camera magazine, but the new edition's out now so not sure how you'd get it. It also refers directly to Photomatix and Photoshop CS3, so you'd need those packages if the article's gonna be of any real use to you.
I'll gladly scan the article and email it to you if you send me a PM.