MLP_Noob

Kinder Morgan's Dividend Payout Rate Is Unsustainable

Very impressed with the knowledge/experience of the commenters here (perhaps the point is made and its time to give the author a break).
I find MLPs attractive but the discussions on tax complications elsewhere scary. So a few newbie questions:
1) Folks holding MLPs in taxable accounts: is the K-1 a big pain come tax time? or not?
2) Folks holding MLPs in tax sheltered accounts: have you ever had more than $1000 UBTI reported? What's the consequence? Typically what acct size should one have to worry about this?
3) Recommendations for solid MLPs would be much appreciated. I am looking at NAT, KMR, EEQ, LINE.
Thanks
MLP_Noob