Strange as it may seem, I find that Debian Squeeze (yes, really!) turns out to be the best rolling distro for me. It's much more stable on my laptop; for instance it never freezes, something that LMDE did regularly.
Now, I know that many of you will protest that Squeeze is not a rolling distro, but I wonder. Backports from Testing our now available, thoroughly tested for Squeeze, and the software source contains 'Squeeze Backports' in its address. For example, it is by this route that I now have Libre Office on my laptop; I do not have any source which contains the word 'Testing' listed in Software Sources. This is what makes me think that this is a way of having a stable distro, which has a, perhaps limited, rolling aspect to it.
Perhaps Clem could look into the possibility of moving LMDE over to the Squeeze code base, and adding Squeeze Backports to Software Sources. I, for one, would be very happy to see this development as I really like Mint, I do not like the 6-monthly cycle of new releases caused by the main release's tie to Ubuntu, and I greatly appreciate the stability of Debian Squeeze. What does anyone else think?