Breastfeeding ? and Thermometer Type ?

Just curious if anyone out there is using/has used a tympanic thermometer? I've got a new one for the kids, and it's SO much faster than my oral one. (I could buy a new oral one, I know, but I am Dutch too... :rolleyes:) I'm actually not temping right now, but I think I will start again soon - I like to know what's going on with my body, and with an irregular cycle, temping is the best way for me to keep track of where I am.
Which brings me to my next question - how many of you have charted while breastfeeding. Did you have any troubles? Was it still fairly accurate, as far as you could tell? I am still (STILL) getting up 2-4 times a night with Emily, so that might mess things up for me too. Any advice or suggestions would be appreciated! Thanks.