In PowerShell v1 you could import comma separated CSV files only. That's not a problem anymore in CTP2. The Import/Export CSV cmdlets got enhanced and now they support a new -delimiter parameter:
PS > get-help import-csv -Parameter delimiter -Delimiter [<char>] Specifies the delimiter that separates the property values in the file that is being imported. The default is a com ma (,). Enter a character, such as a semicolon (;). Required? false Position? 2 Default value , Accept pipeline input? false Accept wildcard characters? false
Note that the delimiter is limited to a single character.
# Export processes to a space separated csv file
PS > get-process | export-csv -delimiter " " -path processes.csv
# Convert csv files: comma separated to tab separated
PS > import-csv test.csv | export-csv -del "`t" -p test1.csv