I have Papertrey's thick 110 lb paper, and my cheap printer refused to print on it. I found this site:
http://www.inkjetart.com/thick.html
...and now my printer prints on this thick cardstock!!!! YEAH!!!!
Basically the link says cut a 1.5 inch strip of normal printer paper and tape one edge to the thick cardstock, overlapping them by .5 inches.
Also, this link was for an Epson printer, but it works for my totally cheap HP f380 printer too.
Of course you will not even have this problem if you have a NICE printer, one which will let you straight-feed the paper.
This would be nice if you want to give digi-stamps a try.
But I just wanted to make some eye-catching flyers in Papertrey colours!!