Good to be a part of a birding community far from my home.
Most of the birders are list keepers as well. One using online resources to keep life lists updated while others are using an application, mainly spreadsheets, to organize lists. I belong to the last mentioned group.
I made the International Ornithological Congress' recommendation far the best. Their list is the most frequently updated. I have created a blank list for both Mac and Windows users. Feel free to download it via my blog.
http://web.me.com/gyorgy.szimuly/SzimiStyles_Birding_Experience_EN/Blog/Blog.html
Cheers, Szimi from Hungary