<p>I asked a couple of coworkers about <a href="http://ankhsvn.open.collab.net" rel="nofollow noreferrer">AnkhSVN</a> and neither one of them was happy with it. One of them went as far as saying that AnkhSVN has messed up his devenv several times.</p>

<p>What's your experience with AnkhSVN? I really miss having an IDE integrated source control tool.</p>

Older AnkhSVN (pre 2.0) was very crappy and I was only using it for shiny icons in the solution explorer. I relied on Tortoise for everything except reverts.
The newer Ankh is a complete rewrite (it is now using the Source Control API of the IDE) and looks & works much better. Still, I haven't forced it to any heavy lifting. Icons is enough for me.
The only gripe I have with 2.0 is the fact that it slaps its footprint to
.sln
files. I always revert them lest they cause problems for co-workers who do not have Ankh installed. I don't know if my fears are groundless or not.
addendum:
I have been using v2.1.7141 a bit more extensively for the last few weeks and here are the new things I have to add:
No ugly crashes that plagued v1.x. Yay!
For some reason, "Show Changes" (diff) windows are limited to only two. Meh.
Diff windows do not allow editing/reverting yet. Boo!
Updates, commits and browsing are MUCH faster than Tortoise. Yay!
All in all, I would not use it standalone, but once you start using it, it becomes an almost indispensable companion to Tortoise.