at the same time i'm sure some of the best photogs got their start from being "the friend with the dslr".
That's exactly how I got started.
Nope, shoot away. I do not do weddings unless both arms are twisted.
Wow. Again, exactly how I got started.
My best friend wanted me to shoot his wedding. I declined. He kept the applying pressure each time we met. After weeks of pleading, he finally got tired of asking and placed me in a hammerlock. He said the only way out is by shooting his wedding.
The second time I was asked to shoot a wedding, I refused. No surprise there.
This time, the bride, also a good friend and a backyard wrestling enthusiast, locked me in a "Sharpshooter."
After that rumors started. About a month later, a 30-something lady grabbed me in a headlock for no apparent reason. I broke free and demanded to know what her problem was. She apologized and said that word around the campfire that I was an adequate photographer who would only work under threat of physical pain. She wanted me to shoot her son's birthday party.
Anyhow, my recommendation is to have two camera at the ceremony: 1 with a 70-200 2.8 and 1 with the fastest wide angle you've got. Oh, and you'll also want a back up for each. For the formal take your time and use what ever lense you're most comfortable with.