I have some levels but they are, as yet, untested. For bd4 it is particularly important that I thoroughly test levels because it's a real pain in the arse to change them. For example, some of the levels in sets 5 and 6 (direct sets with no changes) are impossible in teamwork and at least one is impossible single player. In fact some teamwork only levels are impossible. Others have crap scoring so you get heaps of score, or more commonly less than 100 points. Basically the level vetting and finalisation is a long process. It will also be even harder with the puzzle levels to ensure they are possible and that they are challenging. In have released jungle as half a set but that's because they are very hard levels. Once people get through the jungle levels I have some backup levels to add soon after (although they might be too hard so it's best to wait and try to balance the level set however difficult).
The bottom line is.... I will be making improvements to some of the web pages, the Java version, the client, etc, before releasing these sets. Unfortunately I'm a little stuck on playing fruity at the moment!