There are no scheduled plans for writing my own bridge. For the time being, you'd best assume 64-bit will host only 64-bit, 32-bit only 32-bit, and - going old school now - ppc will only host ppc. If cross architecture hosting is needed, there are some good third party bridging plug-ins available - jBridge, for one. The usual democratic rules apply here though: if enough people nag me for a bridge, I'll get my pontifex hat on and build one!I guess.. the 64 bit version will only be able to host 64 bit stuff and with 32 vice versa?
All this talk of crossover and hosting, and no mention of the phenomenal MuLab / MUX yet?