I've had a few infected batches in a row. I've replaced all my bottling equipment, tubes, buckets, auto-siphon, etc., but I have good reason to believe that the culprit is a funnel that I had been using to top off. I've replaced the funnel, but still have 20 gallons of beer/5 gallons of cider that made it's way through the faulty funnel (since replaced) that I have to bottle still. I can't NOT bottle it.
I have an imperial pale ale that was supposed to finish dry. It's at 1.008 after 2 months in primary/secondary. With this one, and my other batches, I think I'm just going to wait to see if the gravities keep dropping past 1.010. Then I can just dump

and not go through the charade of bottling. It kills me, but it's definately a lesson learned. DO NOT top off with a semi-scratched funnel!!
Anyway, my infections haven't "looked" like anything. There is a phenolic taste that I couldn't pick up right away. The guys at the LHBS could pick it up quickly though and I now know exactly what to look for. Also, these guys were gushers. Not so much when I opened them at colder temps which fooled me for a bit, but when I tested em room temp they were definately gushing. When poured cold they would slowly foam in the bottle, but I'd get a pint glass of foam on top of a half inch of beer.