Considering it's 3months into the ipad, so called "plagued with problems", most stores still can't even keep it in stock. I'll say it's not the problems that'll prevent you from getting an iphone.
Those those problems are relatively minor. My original gen iphone was more fussy, but it's still my bread and butter that no other phone did.
I'll say hold off till you can get an iphone4. If you like iphone, no reason to not get it. It's quite a nice piece of technology if you're not a hater.