Trying out simpy
So I started trying out Simpy. I would have probably just dropped it at my first attempt since I originally failed to import my del.icio.us bookmarks. Otis was nice enough to go forward and contact me, and walk me through the proper way to import my bookmarks, which wasn't exactly intuitive: you need to sync with del.icio.us and just let it run, it is doing something even though it doesn't tell you, and will warn you by email when done. Otis agrees that this is totally counter intuitive and is working on fixing this issue.
In the meantime, I still have trouble getting used to the interface. Coming from del.icio.us got me used to a very simplified interface, which I have come to like very much, especially the tagging interface, which doesn't get in the way while staying powerful. I've put together a little braindump of the things that annoy me in the way the simpy interface is setup, I hope it can be useful to improve it and won't irritate Simpy fans or Otis himself. 
The top right links are too numerous, and duplicate some links that are at the bottom (blog, in particular, is not useful there).
I would also hide the groupes/notes/invite links into the administer or profile links.
For the links listing themselves, the edit/delete buttons could be smaller or just shaded text, and more importantly, after the link title (they're less important).
The links related/cache/email/history could all be hidden behind the "tools" link (which should also be smaller and hidden somewhere.
I don't need to see the actual URL in the listing: it appears in my status bar when I hover over the link title (in blue).
The "tags:" string is also redundant, we can figure out what those are.
The "by anarcat" is redundant if I'm showing my links, they're all mine!
The date is a bit too verbose: apr 9th is enough, and no need for the time.
The interface to post URLs is a bit too simple, and always asks me to create a group. I would also like to see what other people tagged this URL with before tagging it.
Finally, while Simpy annonces proudly that there is no advertisement for registered users, I do see regularly a Google Ads strip at the top of the page, and that is a bit of a nonsense for me. I really like the non-corporate affiliation of Simpy, and I would very much like to get rid of the adverts, maybe even through a donation system.
Otherwise Simpy seems to be an interesting alternative, but I'm not sure I'll get all the people in the office to switch to it!