A couple times per year I pick up a bundt cake for one of the co-worker's happy birthday parties. These cakes are a favorite of the groups. I think we've tried a majority of the flavors and all have been well recieved.
The most recent bundt I picked up was the 10 inch lemon flavor. Even the people in the office who never have any of the birthday cake grab a piece of the bundt consume in record time.
Personally, I haven't eaten one of their cakes in 5 or 6 years but I recall that it was pretty fabulous. I did inquire about the availability of a vegan product and was told that it is not available yet but they are experimenting with the ingredients.