I don't know of anything automatic.
If you have an Evernote account (yep, that app again) you can choose the share option when viewing the app in the App Store and email it to your Evernote account. This creates a note with the app's name, the developer, it's icon, and a link to the store. Depending on how many apps you have in the Purchases section it would probably take quite a while to email them all, and then you'd need to do a little organizing in Evernote; create and move them to a notebook, and edit the subject lines. But once you got caught up it would be fairly painless to add new apps each time you purchase them.
For more details and ideas on how you might use Evernote take a look at this thread:
http://www.ipadforums.net/ipad-apps/105051-evernote-how-do-you-use-tips-tricks.html
The only other trick I know of that works, sort of, is using iTunes on the computer. On the Mac, you can choose the App Library, Select All from the Edit menu, then drag the list to a text editor. Copy and paste does not work, only dragging. Which is kind of frustrating when you can copy and paste the list view of the Music app.
The results are less than stellar. You get the file's path and the apps name in a long list. This can probably be messaged into a spreadsheet or database, but given the sparsity of useful data it is unlikely to be worth the effort.
Hopefully someone else has a better solution. One that does not involve going through each app and entering the data manually.
