As others have said, yes the A2 upconverts.
I just found out over the weekend that my Samsung HL-S6188 has different picture modes available depending on what type of signal (SD or HD) it receives. I had my OPPO set for 1080i output and, while watching Rocky II DVD, noticed that I didn't have the ability to use the "Zoom 1" picture setting. I kept thinking I had the DVD in the player on the 4:3 side or that the OPPO's setting somehow defaulted. I finally gave up troubleshooting and watched the film letter and pillarboxed.
It wasn't until I this past weekend when I started watching "The Abyss" that I figured out the issue. When I set the OPPO to output 480i or 480P, my TV gets all the picture mode; 4:3, 16:9, Wide Fit, Zoom 1 and Zoom 2. When the OPPO is set to output at HD resolution, my TV will only switch between 4:3, 16:9 and Wide Fit. So, with "The Abyss" I couldn't get the picture to the proper aspect ratio until I set the OPPO to output at 480P.
Just something to be aware of.