Observant card collectors might notice that the card Barton signed is not from the regular Topps set. It's one of the variant editions produced for Target last year, printed on traditional cardboard cardstock and utilizing the classic Topps logo.
I originally thought this was s fun parallel set to try to collect. For Series I, Topps shipped full blasters of the variant cards. They had their own UPC code so you could easily find them if you were looking. My memory is a bit fuzzy a year later, but I think I spent between $80-$100 on them.
Series II came out with the same parallels, but there was a change in the program. Instead of getting a full blaster of the exclusive special cards, you only got two packs. At $1 per card, it was no longer a fun collecting project -- it was a huge money sink. I didn't buy any. The parallels continued into Series III, officially known as Topps Update & Highlights. I shudder to think how much someone would have to spend to put that whole set together.
Barton's signature still isn't very pretty, but I think it looks better on a card where it's not on top of a pre-printed facsimile autograph.
I'm only putting autograph-related links in this blogroll. However, if you have a blog or a collector site not specifically about autographs, but with an autograph page or an "autograph" label on your blog posts, I'll put that link here.