The first olympus E3 were sold in November 2007.The seatool housing is coming on June 2008?
I think seven month are too much time to wait.
Now camera models are changing every year , if we have to wait so long we are one year back in cameras technologies.
They should change their minds and do the housings with one month since the model is in stock.
Only if you're the type of person who constantly needs the latest camera... The only potential issue would be if Oly were to replace the E-3 too soon. And again, it was four years between the E-1 and the E-3, with the former still capable of producing great results.
The E-3 has an estimated shutter life of 150,000 exposures. As long as you're happy with the results you get from it, why wouldn't you invest in a housing for it? (Price issues aside - it would actually be cheaper for me to just get an E-520 and a housing for UW and use the E-3 topside.)
There are rumours of a new Oly DSLR, small but weathersealed and with a new sensor. Apparently, according to thoe rumours, without internal flash. Guess that means no fiber optics?