Hey Conrado
Good to talk to you again. I still owe you a drink from ACUW!
I will jump in here and say yes - it is absolutely feasible to intermingle these two CAD packages. Although do try your best to convert them!
The process of sharing files with AutoCAD is largely dependent on the Translators you set up to 'export' to DWG and import their DWG's. These (xml) files are relatively simple to set up (Tools>DWG-DXF Translator Setup... ). You can map layers, pens & colors, and linetypes, and fonts, etc. You can easily switch out drawing units and scales, translate to and from ACAD2000 & ACAD2004, and if you use PlotMaker, you can take advantage of Paperspace. You can even publish all your views in one hit! There's more features than this, but the point is that it is feasible and many people are doing it.
Having said that, it is not
perfect
! For example, you cannot assign wildcards. Take layers for example, you can't map a bunch of layers to just one layer, unless you know the name of every single one and map them individually. Some users complain that their image files do not translate smoothly - if at all. There has also been complaints about text blocks coming in at unpredictable positions, although this can usually be relieved by using matching fonts. Etc, etc.
Despite these and similar issues, you will still be able to work well between both programs. Go for it mate!
Cheers,
Link.