Thanks. Glad you like them. :-)

At the moment I’m mainly going to be looking at improving the implementations of different existing types of collection. I’m going to put in some similar work for sets and then immutable sequences at some point in the not too distant future. Once the collections redesign is properly underway I’ll probably look into adding new types, but until then I’d like to hold off on it.

That being said, if you want such things, I strongly encourage you to work on them! Study the existing implementations in Java, etc, read some papers, generally have a play around. It’s not really that hard, and if you don’t do it because of lack of experience then you’ll never acquire the experience :-)

Any intentions concerning Bags and BiMaps? :-D

These would be really useful (but I haven’t the experience to write that)

Cheers,
Landei