I stopped attending college with one semester left until graduation. It's on my resume and it's never held me back in any way.
The key is that I was able to prove myself early on in my industry (before even leaving college). That set me up with the connections I needed to get my foot in the door.
edit: I guess I should clarify that I left college to take a job, not because I was failing or anything like that.
I'm in the exact same, comfortable, spot. I left college with a year, maybe a hard semester, until I graduated. Took a great job, had lots of work experience even before college and have never had a problem. If you have no experience they look for a degree. If you have no degree they look for experience. Just make sure you have 1 of 2.
I went to a 5 year school with co-operative education (Northeastern University) and ended up quitting and going to work for the company I was interning in a previous semester prior to starting my final year. I have the school listed on my resume but I do not claim to have a degree.
The key is that I was able to prove myself early on in my industry (before even leaving college). That set me up with the connections I needed to get my foot in the door.
edit: I guess I should clarify that I left college to take a job, not because I was failing or anything like that.