If their proposal is ratified and adopted [which seems likely, although
there are a few steps remaining] then apparently the genus name
_Vachellia_ will be used for the former "Acacia subgenus Acacia", and
the name _Acacia_ will become restricted to the phyllode-bearing clade
[again, which includes some species without phyllodes].

Word of Orchard & Maslin's proposal, and its progress through
the botanical legal system?

***
This one is indeed pretty comprehensive
http://farrer.riv.csu.edu.au/ASGAP/APOL35/sep04-7.html
The report in Taxon was published about a month - six weeks back.
(Taxon 53: 826-829. 2004)

Also
http://www.anbg.gov.au/cpbr/taxonomy...rved-2004.html
pvR