Just fly right by 'em. You're going to be too fast for anyone to notice.

I've seen some ladies in those skorts and they are cute. Also the baggier biking shorts with lyrca underneath.

Check out VJ's site and maybe shoot her an email. She is an avid biker and a bigger gal. She's got a great blog and is really inspiring.
http://www.braveathena.com/

Congratulations on your new sport, too, BTW. And welcome to the board.