How should I present my network?

I own a network called the 'Wasp Network'. It is a network of sites that offer different services, using 'wasp' as a suffix in the all the domains in the network, except for the network homepage, which is 'WaspNetwork <dot> com'.

Thus far, I have had all the sites on separate domains, eg:

ImageWasp <dot> com - provides image uploading.
ProxyWasp <dot> com - provides a free online proxy.
DirectoryWasp <dot> com - a link directory.

I am sick of the designs, and am getting a much more minimalist look for all the sites, and unlike before, they will all be using a uniform design so they will all look the same. So I have a question how you think I should present the sites.

- Should I keep them on their separate domains, and you go to each site to do that particular service, or should I forward the old domains to the page and have everything on 'WaspNetwork <dot> com' eg: WaspNetwork <dot> com/image_upload/ ?

There are lots of reasons for each method and i'd like to know your thoughts...

Thanks,

Seb