It's a nice design, but why not make the phone bigger? So it'll be more eye catchy for potential customers. And maybe the text should be bigger and I think, but that's just me, to get a more... uh, futuristic font. Maybe... Would love to read, what this is about. If you don't mind explaining that is.
Verdana is pretty clean when it comes to fonts... Web Optimized JPGs can cut down on quality though. And what is a "futuristic" font?
Font styles like earth normal, and so on. Kinda ones like look a bit 3D if you get what I'm trying to say...
Microsoft Default TT fonts suck balls. They always come off choppy, even with AA on. Also, I save as PNG when saving for web. Always found it much higher quality than JPEGs for web.
To each his own on the fonts... Arial and Verdana are some of the best fonts next to Helvetica (when it comes to versatility) As for file format, I value load time over image quality. Again, to each his own.
Eh, with a single image of this size, unless you're on a dial up connection, there's really no noticeable decline in load time.