http://wonderwinds.com/hackblog.php/2009/09/03/not-a-bloglist-bloglist will do what you're looking for. Pretty sure it works in v3, but untested. By me anyway. Someone else using v3 had an issue that was easily resolved, so as far as I know it'll work.

Thanks. Your plugin worked.

But do I have to worry about it working in future versions of B2Evolution?

By then I would have invested a lot of time and energy, while depending on this plugin. :)

Neither you or I can tell what future releases of b2evolution may or may not change, so why worry now? The idea of a bloglist that has blogs either in it or not in it is as old as b2evolution, so it'll probably be with us for some time. Then again there used to be a little detail where you picked the linkblog for each blog by an ID number. It went away when widgets came along. Anything that was after-market that depended on that detail was no longer needed ... and wouldn't work.

But seriously, when you have a lot of time and energy invested in your domain and installation are you going to just randomly upgrade to whatever comes along without giving serious thought to how it might impact your work? I'd say at this unknown future date you'd probably test the upgrade and list changes that you have to resolve before going live ... or deciding against the upgrade.

Anyway to answer the question no. You don't have to worry about anything. You can if you're into it, but you're not obligated to ;)